Index: dll/win32/shell32/COpenWithMenu.cpp
===================================================================
--- dll/win32/shell32/COpenWithMenu.cpp	(revision 65618)
+++ dll/win32/shell32/COpenWithMenu.cpp	(working copy)
@@ -57,6 +57,7 @@
         static HICON GetIcon(SApp *pApp);
         static BOOL Execute(SApp *pApp, LPCWSTR pwszFilePath);
         static BOOL IsHidden(SApp *pApp);
+        inline BOOL IsNoOpen(VOID) { return m_bNoOpen; }
         BOOL LoadRecommended(LPCWSTR pwszFilePath);
         BOOL SetDefaultHandler(SApp *pApp, LPCWSTR pwszFilename);
 
@@ -775,6 +776,7 @@
         COpenWithDialog(const OPENASINFO *pInfo, COpenWithList *pAppList);
         ~COpenWithDialog();
         static INT_PTR CALLBACK DialogProc(HWND hwndDlg, UINT uMsg, WPARAM wParam, LPARAM lParam);
+        BOOL IsNoOpen(HWND hwnd);
 
     private:
         VOID Init(HWND hwnd);
@@ -781,6 +783,7 @@
         VOID AddApp(COpenWithList::SApp *pApp, BOOL bSelected);
         VOID Browse();
         VOID Accept();
+        static BOOL CALLBACK NoOpenDlgProc(HWND hwnd, UINT Message, WPARAM wParam, LPARAM lParam);
         COpenWithList::SApp *GetCurrentApp();
 
         const OPENASINFO *m_pInfo;
@@ -790,10 +793,11 @@
         HTREEITEM m_hRecommend;
         HTREEITEM m_hOther;
         HIMAGELIST m_hImgList;
+        BOOL m_bNoOpen;
 };
 
 COpenWithDialog::COpenWithDialog(const OPENASINFO *pInfo, COpenWithList *pAppList = NULL):
-    m_pInfo(pInfo), m_pAppList(pAppList), m_hImgList(NULL)
+    m_pInfo(pInfo), m_pAppList(pAppList), m_hImgList(NULL), m_bNoOpen(FALSE)
 {
     if (!m_pAppList)
     {
@@ -812,6 +816,53 @@
         ImageList_Destroy(m_hImgList);
 }
 
+BOOL CALLBACK COpenWithDialog::NoOpenDlgProc(HWND hwnd, UINT Message, WPARAM wParam, LPARAM lParam)
+{
+    switch(Message)
+    {
+        case WM_INITDIALOG:
+        {
+            return TRUE;
+        }
+        case WM_CLOSE:
+            EndDialog(hwnd, IDNO);
+            break;
+        case WM_COMMAND:
+            switch(LOWORD(wParam))
+            {
+                case IDYES:
+                    EndDialog(hwnd, IDYES);
+                break;
+                case IDNO:
+                    EndDialog(hwnd, IDNO);
+                break;
+            }
+        break;
+        default:
+            return FALSE;
+    }
+    return TRUE;
+}
+
+BOOL COpenWithDialog::IsNoOpen(HWND hwnd)
+{
+    /* Only do the actual check if the file type has the 'NoOpen' flag. */
+    if (m_bNoOpen)
+    {
+        int dReturnValue = DialogBox(shell32_hInstance, MAKEINTRESOURCE(IDD_NOOPEN), hwnd, NoOpenDlgProc);
+        
+        if (dReturnValue == IDNO)
+            return TRUE;
+        else if (dReturnValue == -1)
+        {
+            ERR("IsNoOpen failed to load the dialog box.");
+            return TRUE;
+        }
+    }
+
+    return FALSE;
+}
+
 VOID COpenWithDialog::AddApp(COpenWithList::SApp *pApp, BOOL bSelected)
 {
     LPCWSTR pwszName = m_pAppList->GetName(pApp);
@@ -924,6 +975,10 @@
         m_pAppList->Load();
         m_pAppList->LoadRecommended(m_pInfo->pcszFile);
 
+        /* Determine if the type of file can be opened directly from the shell */
+        if (m_pAppList->IsNoOpen() == TRUE)
+            m_bNoOpen = TRUE;
+
         /* Init treeview */
         m_hTreeView = GetDlgItem(hwnd, 14002);
         m_hImgList = ImageList_Create(16, 16, 0, m_pAppList->GetCount() + 1, m_pAppList->GetCount() + 1);
@@ -1395,6 +1450,9 @@
         return E_FAIL;
     }
 
+    if (pDialog.IsNoOpen(hwndParent))
+        return S_OK;
+
     ShowWindow(hwnd, SW_SHOWNORMAL);
 
     while (GetMessage(&msg, NULL, 0, 0) && IsWindow(hwnd))
Index: dll/win32/shell32/lang/bg-BG.rc
===================================================================
--- dll/win32/shell32/lang/bg-BG.rc	(revision 65618)
+++ dll/win32/shell32/lang/bg-BG.rc	(working copy)
@@ -606,6 +606,20 @@
     PUSHBUTTON "Отказ", IDCANCEL, 167, 181, 50, 14
 END
 
+IDD_NOOPEN DIALOGEX 0, 0, 240, 75
+STYLE DS_MODALFRAME | WS_POPUP | WS_CAPTION | WS_SYSMENU
+CAPTION "Caution"
+FONT 8, "MS Shell Dlg"
+BEGIN
+    ICON IDI_SHELL_DOCUMENT, IDI_SHELL_DOCUMENT, 5, 5, 21, 20
+    LTEXT "This file could either be used by the operating system or by\n\
+another application. Modifying this file might damage your\n\
+system or make it less functional.\n\n\
+Are you sure you want to open this file?", IDC_STATIC, 35, 5, 230, 60
+    DEFPUSHBUTTON "Yes", IDYES, 125, 55, 50, 14
+    PUSHBUTTON "No", IDNO, 180, 55, 50, 14
+END
+
 STRINGTABLE
 BEGIN
     /* columns in the shellview */
Index: dll/win32/shell32/lang/ca-ES.rc
===================================================================
--- dll/win32/shell32/lang/ca-ES.rc	(revision 65618)
+++ dll/win32/shell32/lang/ca-ES.rc	(working copy)
@@ -606,6 +606,20 @@
     PUSHBUTTON "Cancel", IDCANCEL, 167, 181, 50, 14
 END
 
+IDD_NOOPEN DIALOGEX 0, 0, 240, 75
+STYLE DS_MODALFRAME | WS_POPUP | WS_CAPTION | WS_SYSMENU
+CAPTION "Caution"
+FONT 8, "MS Shell Dlg"
+BEGIN
+    ICON IDI_SHELL_DOCUMENT, IDI_SHELL_DOCUMENT, 5, 5, 21, 20
+    LTEXT "This file could either be used by the operating system or by\n\
+another application. Modifying this file might damage your\n\
+system or make it less functional.\n\n\
+Are you sure you want to open this file?", IDC_STATIC, 35, 5, 230, 60
+    DEFPUSHBUTTON "Yes", IDYES, 125, 55, 50, 14
+    PUSHBUTTON "No", IDNO, 180, 55, 50, 14
+END
+
 STRINGTABLE
 BEGIN
     /* columns in the shellview */
Index: dll/win32/shell32/lang/cs-CZ.rc
===================================================================
--- dll/win32/shell32/lang/cs-CZ.rc	(revision 65618)
+++ dll/win32/shell32/lang/cs-CZ.rc	(working copy)
@@ -612,6 +612,20 @@
     PUSHBUTTON "Storno", IDCANCEL, 167, 181, 50, 14
 END
 
+IDD_NOOPEN DIALOGEX 0, 0, 240, 75
+STYLE DS_MODALFRAME | WS_POPUP | WS_CAPTION | WS_SYSMENU
+CAPTION "Caution"
+FONT 8, "MS Shell Dlg"
+BEGIN
+    ICON IDI_SHELL_DOCUMENT, IDI_SHELL_DOCUMENT, 5, 5, 21, 20
+    LTEXT "This file could either be used by the operating system or by\n\
+another application. Modifying this file might damage your\n\
+system or make it less functional.\n\n\
+Are you sure you want to open this file?", IDC_STATIC, 35, 5, 230, 60
+    DEFPUSHBUTTON "Yes", IDYES, 125, 55, 50, 14
+    PUSHBUTTON "No", IDNO, 180, 55, 50, 14
+END
+
 STRINGTABLE
 BEGIN
     /* columns in the shellview */
Index: dll/win32/shell32/lang/da-DK.rc
===================================================================
--- dll/win32/shell32/lang/da-DK.rc	(revision 65618)
+++ dll/win32/shell32/lang/da-DK.rc	(working copy)
@@ -612,6 +612,20 @@
     PUSHBUTTON "Cancel", IDCANCEL, 167, 181, 50, 14
 END
 
+IDD_NOOPEN DIALOGEX 0, 0, 240, 75
+STYLE DS_MODALFRAME | WS_POPUP | WS_CAPTION | WS_SYSMENU
+CAPTION "Caution"
+FONT 8, "MS Shell Dlg"
+BEGIN
+    ICON IDI_SHELL_DOCUMENT, IDI_SHELL_DOCUMENT, 5, 5, 21, 20
+    LTEXT "This file could either be used by the operating system or by\n\
+another application. Modifying this file might damage your\n\
+system or make it less functional.\n\n\
+Are you sure you want to open this file?", IDC_STATIC, 35, 5, 230, 60
+    DEFPUSHBUTTON "Yes", IDYES, 125, 55, 50, 14
+    PUSHBUTTON "No", IDNO, 180, 55, 50, 14
+END
+
 STRINGTABLE
 BEGIN
     /* columns in the shellview */
Index: dll/win32/shell32/lang/de-DE.rc
===================================================================
--- dll/win32/shell32/lang/de-DE.rc	(revision 65618)
+++ dll/win32/shell32/lang/de-DE.rc	(working copy)
@@ -606,6 +606,20 @@
     PUSHBUTTON "Abbrechen", IDCANCEL, 167, 181, 50, 14
 END
 
+IDD_NOOPEN DIALOGEX 0, 0, 240, 75
+STYLE DS_MODALFRAME | WS_POPUP | WS_CAPTION | WS_SYSMENU
+CAPTION "Caution"
+FONT 8, "MS Shell Dlg"
+BEGIN
+    ICON IDI_SHELL_DOCUMENT, IDI_SHELL_DOCUMENT, 5, 5, 21, 20
+    LTEXT "This file could either be used by the operating system or by\n\
+another application. Modifying this file might damage your\n\
+system or make it less functional.\n\n\
+Are you sure you want to open this file?", IDC_STATIC, 35, 5, 230, 60
+    DEFPUSHBUTTON "Yes", IDYES, 125, 55, 50, 14
+    PUSHBUTTON "No", IDNO, 180, 55, 50, 14
+END
+
 STRINGTABLE
 BEGIN
     /* columns in the shellview */
Index: dll/win32/shell32/lang/el-GR.rc
===================================================================
--- dll/win32/shell32/lang/el-GR.rc	(revision 65618)
+++ dll/win32/shell32/lang/el-GR.rc	(working copy)
@@ -606,6 +606,20 @@
     PUSHBUTTON "Cancel", IDCANCEL, 167, 181, 50, 14
 END
 
+IDD_NOOPEN DIALOGEX 0, 0, 240, 75
+STYLE DS_MODALFRAME | WS_POPUP | WS_CAPTION | WS_SYSMENU
+CAPTION "Caution"
+FONT 8, "MS Shell Dlg"
+BEGIN
+    ICON IDI_SHELL_DOCUMENT, IDI_SHELL_DOCUMENT, 5, 5, 21, 20
+    LTEXT "This file could either be used by the operating system or by\n\
+another application. Modifying this file might damage your\n\
+system or make it less functional.\n\n\
+Are you sure you want to open this file?", IDC_STATIC, 35, 5, 230, 60
+    DEFPUSHBUTTON "Yes", IDYES, 125, 55, 50, 14
+    PUSHBUTTON "No", IDNO, 180, 55, 50, 14
+END
+
 STRINGTABLE
 BEGIN
     /* columns in the shellview */
Index: dll/win32/shell32/lang/en-GB.rc
===================================================================
--- dll/win32/shell32/lang/en-GB.rc	(revision 65618)
+++ dll/win32/shell32/lang/en-GB.rc	(working copy)
@@ -606,6 +606,20 @@
     PUSHBUTTON "Cancel", IDCANCEL, 167, 181, 50, 14
 END
 
+IDD_NOOPEN DIALOGEX 0, 0, 240, 75
+STYLE DS_MODALFRAME | WS_POPUP | WS_CAPTION | WS_SYSMENU
+CAPTION "Caution"
+FONT 8, "MS Shell Dlg"
+BEGIN
+    ICON IDI_SHELL_DOCUMENT, IDI_SHELL_DOCUMENT, 5, 5, 21, 20
+    LTEXT "This file could either be used by the operating system or by\n\
+another application. Modifying this file might damage your\n\
+system or make it less functional.\n\n\
+Are you sure you want to open this file?", IDC_STATIC, 35, 5, 230, 60
+    DEFPUSHBUTTON "Yes", IDYES, 125, 55, 50, 14
+    PUSHBUTTON "No", IDNO, 180, 55, 50, 14
+END
+
 STRINGTABLE
 BEGIN
     /* columns in the shellview */
Index: dll/win32/shell32/lang/en-US.rc
===================================================================
--- dll/win32/shell32/lang/en-US.rc	(revision 65618)
+++ dll/win32/shell32/lang/en-US.rc	(working copy)
@@ -623,6 +623,20 @@
     PUSHBUTTON "Cancel", IDCANCEL, 167, 181, 50, 14
 END
 
+IDD_NOOPEN DIALOGEX 0, 0, 240, 75
+STYLE DS_MODALFRAME | WS_POPUP | WS_CAPTION | WS_SYSMENU
+CAPTION "Caution"
+FONT 8, "MS Shell Dlg"
+BEGIN
+    ICON IDI_SHELL_DOCUMENT, IDI_SHELL_DOCUMENT, 5, 5, 21, 20
+    LTEXT "This file could either be used by the operating system or by\n\
+another application. Modifying this file might damage your\n\
+system or make it less functional.\n\n\
+Are you sure you want to open this file?", IDC_STATIC, 35, 5, 230, 60
+    DEFPUSHBUTTON "Yes", IDYES, 125, 55, 50, 14
+    PUSHBUTTON "No", IDNO, 180, 55, 50, 14
+END
+
 STRINGTABLE
 BEGIN
     /* columns in the shellview */
Index: dll/win32/shell32/lang/es-ES.rc
===================================================================
--- dll/win32/shell32/lang/es-ES.rc	(revision 65618)
+++ dll/win32/shell32/lang/es-ES.rc	(working copy)
@@ -606,6 +606,20 @@
     PUSHBUTTON "Cancelar", IDCANCEL, 167, 181, 50, 14
 END
 
+IDD_NOOPEN DIALOGEX 0, 0, 240, 75
+STYLE DS_MODALFRAME | WS_POPUP | WS_CAPTION | WS_SYSMENU
+CAPTION "Caution"
+FONT 8, "MS Shell Dlg"
+BEGIN
+    ICON IDI_SHELL_DOCUMENT, IDI_SHELL_DOCUMENT, 5, 5, 21, 20
+    LTEXT "This file could either be used by the operating system or by\n\
+another application. Modifying this file might damage your\n\
+system or make it less functional.\n\n\
+Are you sure you want to open this file?", IDC_STATIC, 35, 5, 230, 60
+    DEFPUSHBUTTON "Yes", IDYES, 125, 55, 50, 14
+    PUSHBUTTON "No", IDNO, 180, 55, 50, 14
+END
+
 STRINGTABLE
 BEGIN
     /* columns in the shellview */
Index: dll/win32/shell32/lang/fi-FI.rc
===================================================================
--- dll/win32/shell32/lang/fi-FI.rc	(revision 65618)
+++ dll/win32/shell32/lang/fi-FI.rc	(working copy)
@@ -606,6 +606,20 @@
     PUSHBUTTON "Cancel", IDCANCEL, 167, 181, 50, 14
 END
 
+IDD_NOOPEN DIALOGEX 0, 0, 240, 75
+STYLE DS_MODALFRAME | WS_POPUP | WS_CAPTION | WS_SYSMENU
+CAPTION "Caution"
+FONT 8, "MS Shell Dlg"
+BEGIN
+    ICON IDI_SHELL_DOCUMENT, IDI_SHELL_DOCUMENT, 5, 5, 21, 20
+    LTEXT "This file could either be used by the operating system or by\n\
+another application. Modifying this file might damage your\n\
+system or make it less functional.\n\n\
+Are you sure you want to open this file?", IDC_STATIC, 35, 5, 230, 60
+    DEFPUSHBUTTON "Yes", IDYES, 125, 55, 50, 14
+    PUSHBUTTON "No", IDNO, 180, 55, 50, 14
+END
+
 STRINGTABLE
 BEGIN
     /* columns in the shellview */
Index: dll/win32/shell32/lang/fr-FR.rc
===================================================================
--- dll/win32/shell32/lang/fr-FR.rc	(revision 65618)
+++ dll/win32/shell32/lang/fr-FR.rc	(working copy)
@@ -606,6 +606,20 @@
     PUSHBUTTON "Annuler", IDCANCEL, 167, 181, 50, 14
 END
 
+IDD_NOOPEN DIALOGEX 0, 0, 240, 75
+STYLE DS_MODALFRAME | WS_POPUP | WS_CAPTION | WS_SYSMENU
+CAPTION "Caution"
+FONT 8, "MS Shell Dlg"
+BEGIN
+    ICON IDI_SHELL_DOCUMENT, IDI_SHELL_DOCUMENT, 5, 5, 21, 20
+    LTEXT "This file could either be used by the operating system or by\n\
+another application. Modifying this file might damage your\n\
+system or make it less functional.\n\n\
+Are you sure you want to open this file?", IDC_STATIC, 35, 5, 230, 60
+    DEFPUSHBUTTON "Yes", IDYES, 125, 55, 50, 14
+    PUSHBUTTON "No", IDNO, 180, 55, 50, 14
+END
+
 STRINGTABLE
 BEGIN
     /* columns in the shellview */
Index: dll/win32/shell32/lang/he-IL.rc
===================================================================
--- dll/win32/shell32/lang/he-IL.rc	(revision 65618)
+++ dll/win32/shell32/lang/he-IL.rc	(working copy)
@@ -606,6 +606,20 @@
     PUSHBUTTON "Cancel", IDCANCEL, 167, 181, 50, 14
 END
 
+IDD_NOOPEN DIALOGEX 0, 0, 240, 75
+STYLE DS_MODALFRAME | WS_POPUP | WS_CAPTION | WS_SYSMENU
+CAPTION "Caution"
+FONT 8, "MS Shell Dlg"
+BEGIN
+    ICON IDI_SHELL_DOCUMENT, IDI_SHELL_DOCUMENT, 5, 5, 21, 20
+    LTEXT "This file could either be used by the operating system or by\n\
+another application. Modifying this file might damage your\n\
+system or make it less functional.\n\n\
+Are you sure you want to open this file?", IDC_STATIC, 35, 5, 230, 60
+    DEFPUSHBUTTON "Yes", IDYES, 125, 55, 50, 14
+    PUSHBUTTON "No", IDNO, 180, 55, 50, 14
+END
+
 STRINGTABLE
 BEGIN
     /* columns in the shellview */
Index: dll/win32/shell32/lang/hu-HU.rc
===================================================================
--- dll/win32/shell32/lang/hu-HU.rc	(revision 65618)
+++ dll/win32/shell32/lang/hu-HU.rc	(working copy)
@@ -606,6 +606,20 @@
     PUSHBUTTON "Cancel", IDCANCEL, 167, 181, 50, 14
 END
 
+IDD_NOOPEN DIALOGEX 0, 0, 240, 75
+STYLE DS_MODALFRAME | WS_POPUP | WS_CAPTION | WS_SYSMENU
+CAPTION "Caution"
+FONT 8, "MS Shell Dlg"
+BEGIN
+    ICON IDI_SHELL_DOCUMENT, IDI_SHELL_DOCUMENT, 5, 5, 21, 20
+    LTEXT "This file could either be used by the operating system or by\n\
+another application. Modifying this file might damage your\n\
+system or make it less functional.\n\n\
+Are you sure you want to open this file?", IDC_STATIC, 35, 5, 230, 60
+    DEFPUSHBUTTON "Yes", IDYES, 125, 55, 50, 14
+    PUSHBUTTON "No", IDNO, 180, 55, 50, 14
+END
+
 STRINGTABLE
 BEGIN
     /* columns in the shellview */
Index: dll/win32/shell32/lang/it-IT.rc
===================================================================
--- dll/win32/shell32/lang/it-IT.rc	(revision 65618)
+++ dll/win32/shell32/lang/it-IT.rc	(working copy)
@@ -606,6 +606,20 @@
     PUSHBUTTON "Annulla", IDCANCEL, 167, 181, 50, 14
 END
 
+IDD_NOOPEN DIALOGEX 0, 0, 240, 75
+STYLE DS_MODALFRAME | WS_POPUP | WS_CAPTION | WS_SYSMENU
+CAPTION "Caution"
+FONT 8, "MS Shell Dlg"
+BEGIN
+    ICON IDI_SHELL_DOCUMENT, IDI_SHELL_DOCUMENT, 5, 5, 21, 20
+    LTEXT "This file could either be used by the operating system or by\n\
+another application. Modifying this file might damage your\n\
+system or make it less functional.\n\n\
+Are you sure you want to open this file?", IDC_STATIC, 35, 5, 230, 60
+    DEFPUSHBUTTON "Yes", IDYES, 125, 55, 50, 14
+    PUSHBUTTON "No", IDNO, 180, 55, 50, 14
+END
+
 STRINGTABLE
 BEGIN
     /* columns in the shellview */
Index: dll/win32/shell32/lang/ja-JP.rc
===================================================================
--- dll/win32/shell32/lang/ja-JP.rc	(revision 65618)
+++ dll/win32/shell32/lang/ja-JP.rc	(working copy)
@@ -606,6 +606,20 @@
     PUSHBUTTON "キャンセル", IDCANCEL, 167, 181, 50, 14
 END
 
+IDD_NOOPEN DIALOGEX 0, 0, 240, 75
+STYLE DS_MODALFRAME | WS_POPUP | WS_CAPTION | WS_SYSMENU
+CAPTION "Caution"
+FONT 9, "MS UI Gothic"
+BEGIN
+    ICON IDI_SHELL_DOCUMENT, IDI_SHELL_DOCUMENT, 5, 5, 21, 20
+    LTEXT "This file could either be used by the operating system or by\n\
+another application. Modifying this file might damage your\n\
+system or make it less functional.\n\n\
+Are you sure you want to open this file?", IDC_STATIC, 35, 5, 230, 60
+    DEFPUSHBUTTON "Yes", IDYES, 125, 55, 50, 14
+    PUSHBUTTON "No", IDNO, 180, 55, 50, 14
+END
+
 STRINGTABLE
 BEGIN
     /* columns in the shellview */
Index: dll/win32/shell32/lang/ko-KR.rc
===================================================================
--- dll/win32/shell32/lang/ko-KR.rc	(revision 65618)
+++ dll/win32/shell32/lang/ko-KR.rc	(working copy)
@@ -606,6 +606,20 @@
     PUSHBUTTON "Cancel", IDCANCEL, 167, 181, 50, 14
 END
 
+IDD_NOOPEN DIALOGEX 0, 0, 240, 75
+STYLE DS_MODALFRAME | WS_POPUP | WS_CAPTION | WS_SYSMENU
+CAPTION "Caution"
+FONT 8, "MS Shell Dlg"
+BEGIN
+    ICON IDI_SHELL_DOCUMENT, IDI_SHELL_DOCUMENT, 5, 5, 21, 20
+    LTEXT "This file could either be used by the operating system or by\n\
+another application. Modifying this file might damage your\n\
+system or make it less functional.\n\n\
+Are you sure you want to open this file?", IDC_STATIC, 35, 5, 230, 60
+    DEFPUSHBUTTON "Yes", IDYES, 125, 55, 50, 14
+    PUSHBUTTON "No", IDNO, 180, 55, 50, 14
+END
+
 STRINGTABLE
 BEGIN
     /* columns in the shellview */
Index: dll/win32/shell32/lang/nl-NL.rc
===================================================================
--- dll/win32/shell32/lang/nl-NL.rc	(revision 65618)
+++ dll/win32/shell32/lang/nl-NL.rc	(working copy)
@@ -606,6 +606,20 @@
     PUSHBUTTON "Cancel", IDCANCEL, 167, 181, 50, 14
 END
 
+IDD_NOOPEN DIALOGEX 0, 0, 240, 75
+STYLE DS_MODALFRAME | WS_POPUP | WS_CAPTION | WS_SYSMENU
+CAPTION "Caution"
+FONT 8, "MS Shell Dlg"
+BEGIN
+    ICON IDI_SHELL_DOCUMENT, IDI_SHELL_DOCUMENT, 5, 5, 21, 20
+    LTEXT "This file could either be used by the operating system or by\n\
+another application. Modifying this file might damage your\n\
+system or make it less functional.\n\n\
+Are you sure you want to open this file?", IDC_STATIC, 35, 5, 230, 60
+    DEFPUSHBUTTON "Yes", IDYES, 125, 55, 50, 14
+    PUSHBUTTON "No", IDNO, 180, 55, 50, 14
+END
+
 STRINGTABLE
 BEGIN
     /* columns in the shellview */
Index: dll/win32/shell32/lang/no-NO.rc
===================================================================
--- dll/win32/shell32/lang/no-NO.rc	(revision 65618)
+++ dll/win32/shell32/lang/no-NO.rc	(working copy)
@@ -606,6 +606,20 @@
     PUSHBUTTON "Avbryt", IDCANCEL, 167, 181, 50, 14
 END
 
+IDD_NOOPEN DIALOGEX 0, 0, 240, 75
+STYLE DS_MODALFRAME | WS_POPUP | WS_CAPTION | WS_SYSMENU
+CAPTION "Caution"
+FONT 8, "MS Shell Dlg"
+BEGIN
+    ICON IDI_SHELL_DOCUMENT, IDI_SHELL_DOCUMENT, 5, 5, 21, 20
+    LTEXT "This file could either be used by the operating system or by\n\
+another application. Modifying this file might damage your\n\
+system or make it less functional.\n\n\
+Are you sure you want to open this file?", IDC_STATIC, 35, 5, 230, 60
+    DEFPUSHBUTTON "Yes", IDYES, 125, 55, 50, 14
+    PUSHBUTTON "No", IDNO, 180, 55, 50, 14
+END
+
 STRINGTABLE
 BEGIN
     /* columns in the shellview */
Index: dll/win32/shell32/lang/pl-PL.rc
===================================================================
--- dll/win32/shell32/lang/pl-PL.rc	(revision 65618)
+++ dll/win32/shell32/lang/pl-PL.rc	(working copy)
@@ -606,6 +606,20 @@
     PUSHBUTTON "Anuluj", IDCANCEL, 167, 181, 50, 14
 END
 
+IDD_NOOPEN DIALOGEX 0, 0, 240, 75
+STYLE DS_MODALFRAME | WS_POPUP | WS_CAPTION | WS_SYSMENU
+CAPTION "Caution"
+FONT 8, "MS Shell Dlg"
+BEGIN
+    ICON IDI_SHELL_DOCUMENT, IDI_SHELL_DOCUMENT, 5, 5, 21, 20
+    LTEXT "This file could either be used by the operating system or by\n\
+another application. Modifying this file might damage your\n\
+system or make it less functional.\n\n\
+Are you sure you want to open this file?", IDC_STATIC, 35, 5, 230, 60
+    DEFPUSHBUTTON "Yes", IDYES, 125, 55, 50, 14
+    PUSHBUTTON "No", IDNO, 180, 55, 50, 14
+END
+
 STRINGTABLE
 BEGIN
     /* columns in the shellview */
Index: dll/win32/shell32/lang/pt-BR.rc
===================================================================
--- dll/win32/shell32/lang/pt-BR.rc	(revision 65618)
+++ dll/win32/shell32/lang/pt-BR.rc	(working copy)
@@ -606,6 +606,20 @@
     PUSHBUTTON "Cancelar", IDCANCEL, 167, 181, 50, 14
 END
 
+IDD_NOOPEN DIALOGEX 0, 0, 240, 75
+STYLE DS_MODALFRAME | WS_POPUP | WS_CAPTION | WS_SYSMENU
+CAPTION "Caution"
+FONT 8, "MS Shell Dlg"
+BEGIN
+    ICON IDI_SHELL_DOCUMENT, IDI_SHELL_DOCUMENT, 5, 5, 21, 20
+    LTEXT "This file could either be used by the operating system or by\n\
+another application. Modifying this file might damage your\n\
+system or make it less functional.\n\n\
+Are you sure you want to open this file?", IDC_STATIC, 35, 5, 230, 60
+    DEFPUSHBUTTON "Yes", IDYES, 125, 55, 50, 14
+    PUSHBUTTON "No", IDNO, 180, 55, 50, 14
+END
+
 STRINGTABLE
 BEGIN
     /* columns in the shellview */
Index: dll/win32/shell32/lang/pt-PT.rc
===================================================================
--- dll/win32/shell32/lang/pt-PT.rc	(revision 65618)
+++ dll/win32/shell32/lang/pt-PT.rc	(working copy)
@@ -606,6 +606,20 @@
     PUSHBUTTON "Cancelar", IDCANCEL, 167, 181, 50, 14
 END
 
+IDD_NOOPEN DIALOGEX 0, 0, 240, 75
+STYLE DS_MODALFRAME | WS_POPUP | WS_CAPTION | WS_SYSMENU
+CAPTION "Caution"
+FONT 8, "MS Shell Dlg"
+BEGIN
+    ICON IDI_SHELL_DOCUMENT, IDI_SHELL_DOCUMENT, 5, 5, 21, 20
+    LTEXT "This file could either be used by the operating system or by\n\
+another application. Modifying this file might damage your\n\
+system or make it less functional.\n\n\
+Are you sure you want to open this file?", IDC_STATIC, 35, 5, 230, 60
+    DEFPUSHBUTTON "Yes", IDYES, 125, 55, 50, 14
+    PUSHBUTTON "No", IDNO, 180, 55, 50, 14
+END
+
 STRINGTABLE
 BEGIN
     /* columns in the shellview */
Index: dll/win32/shell32/lang/ro-RO.rc
===================================================================
--- dll/win32/shell32/lang/ro-RO.rc	(revision 65618)
+++ dll/win32/shell32/lang/ro-RO.rc	(working copy)
@@ -608,6 +608,34 @@
     PUSHBUTTON "A&nulează", IDCANCEL, 167, 181, 50, 14
 END
 
+IDD_NOOPEN DIALOGEX 0, 0, 240, 75
+STYLE DS_MODALFRAME | WS_POPUP | WS_CAPTION | WS_SYSMENU
+CAPTION "Caution"
+FONT 8, "MS Shell Dlg"
+BEGIN
+    ICON IDI_SHELL_DOCUMENT, IDI_SHELL_DOCUMENT, 5, 5, 21, 20
+    LTEXT "This file could either be used by the operating system or by\n\
+another application. Modifying this file might damage your\n\
+system or make it less functional.\n\n\
+Are you sure you want to open this file?", IDC_STATIC, 35, 5, 230, 60
+    DEFPUSHBUTTON "Yes", IDYES, 125, 55, 50, 14
+    PUSHBUTTON "No", IDNO, 180, 55, 50, 14
+END
+
+IDD_NOOPEN DIALOGEX 0, 0, 240, 75
+STYLE DS_MODALFRAME | WS_POPUP | WS_CAPTION | WS_SYSMENU
+CAPTION "Caution"
+FONT 8, "MS Shell Dlg"
+BEGIN
+    ICON IDI_SHELL_DOCUMENT, IDI_SHELL_DOCUMENT, 5, 5, 21, 20
+    LTEXT "This file could either be used by the operating system or by\n\
+another application. Modifying this file might damage your\n\
+system or make it less functional.\n\n\
+Are you sure you want to open this file?", IDC_STATIC, 35, 5, 230, 60
+    DEFPUSHBUTTON "Yes", IDYES, 125, 55, 50, 14
+    PUSHBUTTON "No", IDNO, 180, 55, 50, 14
+END
+
 STRINGTABLE
 BEGIN
     /* columns in the shellview */
Index: dll/win32/shell32/lang/ru-RU.rc
===================================================================
--- dll/win32/shell32/lang/ru-RU.rc	(revision 65618)
+++ dll/win32/shell32/lang/ru-RU.rc	(working copy)
@@ -608,6 +608,20 @@
     PUSHBUTTON "Отмена",IDCANCEL, 167, 181, 50, 14
 END
 
+IDD_NOOPEN DIALOGEX 0, 0, 240, 75
+STYLE DS_MODALFRAME | WS_POPUP | WS_CAPTION | WS_SYSMENU
+CAPTION "Caution"
+FONT 8, "MS Shell Dlg"
+BEGIN
+    ICON IDI_SHELL_DOCUMENT, IDI_SHELL_DOCUMENT, 5, 5, 21, 20
+    LTEXT "This file could either be used by the operating system or by\n\
+another application. Modifying this file might damage your\n\
+system or make it less functional.\n\n\
+Are you sure you want to open this file?", IDC_STATIC, 35, 5, 230, 60
+    DEFPUSHBUTTON "Yes", IDYES, 125, 55, 50, 14
+    PUSHBUTTON "No", IDNO, 180, 55, 50, 14
+END
+
 STRINGTABLE
 BEGIN
     /* columns in the shellview */
Index: dll/win32/shell32/lang/sk-SK.rc
===================================================================
--- dll/win32/shell32/lang/sk-SK.rc	(revision 65618)
+++ dll/win32/shell32/lang/sk-SK.rc	(working copy)
@@ -606,6 +606,20 @@
     PUSHBUTTON "Zrušiť", IDCANCEL, 167, 181, 50, 14
 END
 
+IDD_NOOPEN DIALOGEX 0, 0, 240, 75
+STYLE DS_MODALFRAME | WS_POPUP | WS_CAPTION | WS_SYSMENU
+CAPTION "Caution"
+FONT 8, "MS Shell Dlg"
+BEGIN
+    ICON IDI_SHELL_DOCUMENT, IDI_SHELL_DOCUMENT, 5, 5, 21, 20
+    LTEXT "This file could either be used by the operating system or by\n\
+another application. Modifying this file might damage your\n\
+system or make it less functional.\n\n\
+Are you sure you want to open this file?", IDC_STATIC, 35, 5, 230, 60
+    DEFPUSHBUTTON "Yes", IDYES, 125, 55, 50, 14
+    PUSHBUTTON "No", IDNO, 180, 55, 50, 14
+END
+
 STRINGTABLE
 BEGIN
     /* columns in the shellview */
Index: dll/win32/shell32/lang/sl-SI.rc
===================================================================
--- dll/win32/shell32/lang/sl-SI.rc	(revision 65618)
+++ dll/win32/shell32/lang/sl-SI.rc	(working copy)
@@ -606,6 +606,20 @@
     PUSHBUTTON "Cancel", IDCANCEL, 167, 181, 50, 14
 END
 
+IDD_NOOPEN DIALOGEX 0, 0, 240, 75
+STYLE DS_MODALFRAME | WS_POPUP | WS_CAPTION | WS_SYSMENU
+CAPTION "Caution"
+FONT 8, "MS Shell Dlg"
+BEGIN
+    ICON IDI_SHELL_DOCUMENT, IDI_SHELL_DOCUMENT, 5, 5, 21, 20
+    LTEXT "This file could either be used by the operating system or by\n\
+another application. Modifying this file might damage your\n\
+system or make it less functional.\n\n\
+Are you sure you want to open this file?", IDC_STATIC, 35, 5, 230, 60
+    DEFPUSHBUTTON "Yes", IDYES, 125, 55, 50, 14
+    PUSHBUTTON "No", IDNO, 180, 55, 50, 14
+END
+
 STRINGTABLE
 BEGIN
     /* columns in the shellview */
Index: dll/win32/shell32/lang/sq-AL.rc
===================================================================
--- dll/win32/shell32/lang/sq-AL.rc	(revision 65618)
+++ dll/win32/shell32/lang/sq-AL.rc	(working copy)
@@ -610,6 +610,20 @@
     PUSHBUTTON "Anulo", IDCANCEL, 167, 181, 50, 14
 END
 
+IDD_NOOPEN DIALOGEX 0, 0, 240, 75
+STYLE DS_MODALFRAME | WS_POPUP | WS_CAPTION | WS_SYSMENU
+CAPTION "Caution"
+FONT 8, "MS Shell Dlg"
+BEGIN
+    ICON IDI_SHELL_DOCUMENT, IDI_SHELL_DOCUMENT, 5, 5, 21, 20
+    LTEXT "This file could either be used by the operating system or by\n\
+another application. Modifying this file might damage your\n\
+system or make it less functional.\n\n\
+Are you sure you want to open this file?", IDC_STATIC, 35, 5, 230, 60
+    DEFPUSHBUTTON "Yes", IDYES, 125, 55, 50, 14
+    PUSHBUTTON "No", IDNO, 180, 55, 50, 14
+END
+
 STRINGTABLE
 BEGIN
     /* columns in the shellview */
Index: dll/win32/shell32/lang/sv-SE.rc
===================================================================
--- dll/win32/shell32/lang/sv-SE.rc	(revision 65618)
+++ dll/win32/shell32/lang/sv-SE.rc	(working copy)
@@ -606,6 +606,20 @@
     PUSHBUTTON "Cancel", IDCANCEL, 167, 181, 50, 14
 END
 
+IDD_NOOPEN DIALOGEX 0, 0, 240, 75
+STYLE DS_MODALFRAME | WS_POPUP | WS_CAPTION | WS_SYSMENU
+CAPTION "Caution"
+FONT 8, "MS Shell Dlg"
+BEGIN
+    ICON IDI_SHELL_DOCUMENT, IDI_SHELL_DOCUMENT, 5, 5, 21, 20
+    LTEXT "This file could either be used by the operating system or by\n\
+another application. Modifying this file might damage your\n\
+system or make it less functional.\n\n\
+Are you sure you want to open this file?", IDC_STATIC, 35, 5, 230, 60
+    DEFPUSHBUTTON "Yes", IDYES, 125, 55, 50, 14
+    PUSHBUTTON "No", IDNO, 180, 55, 50, 14
+END
+
 STRINGTABLE
 BEGIN
     /* columns in the shellview */
Index: dll/win32/shell32/lang/tr-TR.rc
===================================================================
--- dll/win32/shell32/lang/tr-TR.rc	(revision 65618)
+++ dll/win32/shell32/lang/tr-TR.rc	(working copy)
@@ -606,6 +606,20 @@
     PUSHBUTTON "İptal", IDCANCEL, 167, 181, 50, 14
 END
 
+IDD_NOOPEN DIALOGEX 0, 0, 240, 75
+STYLE DS_MODALFRAME | WS_POPUP | WS_CAPTION | WS_SYSMENU
+CAPTION "Caution"
+FONT 8, "MS Shell Dlg"
+BEGIN
+    ICON IDI_SHELL_DOCUMENT, IDI_SHELL_DOCUMENT, 5, 5, 21, 20
+    LTEXT "This file could either be used by the operating system or by\n\
+another application. Modifying this file might damage your\n\
+system or make it less functional.\n\n\
+Are you sure you want to open this file?", IDC_STATIC, 35, 5, 230, 60
+    DEFPUSHBUTTON "Yes", IDYES, 125, 55, 50, 14
+    PUSHBUTTON "No", IDNO, 180, 55, 50, 14
+END
+
 STRINGTABLE
 BEGIN
     /* columns in the shellview */
Index: dll/win32/shell32/lang/uk-UA.rc
===================================================================
--- dll/win32/shell32/lang/uk-UA.rc	(revision 65618)
+++ dll/win32/shell32/lang/uk-UA.rc	(working copy)
@@ -606,6 +606,20 @@
     PUSHBUTTON "Скасувати", IDCANCEL, 167, 181, 50, 14
 END
 
+IDD_NOOPEN DIALOGEX 0, 0, 240, 75
+STYLE DS_MODALFRAME | WS_POPUP | WS_CAPTION | WS_SYSMENU
+CAPTION "Caution"
+FONT 8, "MS Shell Dlg"
+BEGIN
+    ICON IDI_SHELL_DOCUMENT, IDI_SHELL_DOCUMENT, 5, 5, 21, 20
+    LTEXT "This file could either be used by the operating system or by\n\
+another application. Modifying this file might damage your\n\
+system or make it less functional.\n\n\
+Are you sure you want to open this file?", IDC_STATIC, 35, 5, 230, 60
+    DEFPUSHBUTTON "Yes", IDYES, 125, 55, 50, 14
+    PUSHBUTTON "No", IDNO, 180, 55, 50, 14
+END
+
 STRINGTABLE
 BEGIN
     /* columns in the shellview */
Index: dll/win32/shell32/lang/zh-CN.rc
===================================================================
--- dll/win32/shell32/lang/zh-CN.rc	(revision 65618)
+++ dll/win32/shell32/lang/zh-CN.rc	(working copy)
@@ -615,6 +615,20 @@
     PUSHBUTTON "取消", IDCANCEL, 167, 181, 50, 14
 END
 
+IDD_NOOPEN DIALOGEX 0, 0, 240, 75
+STYLE DS_MODALFRAME | WS_POPUP | WS_CAPTION | WS_SYSMENU
+CAPTION "Caution"
+FONT 8, "MS Shell Dlg"
+BEGIN
+    ICON IDI_SHELL_DOCUMENT, IDI_SHELL_DOCUMENT, 5, 5, 21, 20
+    LTEXT "This file could either be used by the operating system or by\n\
+another application. Modifying this file might damage your\n\
+system or make it less functional.\n\n\
+Are you sure you want to open this file?", IDC_STATIC, 35, 5, 230, 60
+    DEFPUSHBUTTON "Yes", IDYES, 125, 55, 50, 14
+    PUSHBUTTON "No", IDNO, 180, 55, 50, 14
+END
+
 STRINGTABLE
 BEGIN
     /* columns in the shellview */
Index: dll/win32/shell32/lang/zh-TW.rc
===================================================================
--- dll/win32/shell32/lang/zh-TW.rc	(revision 65618)
+++ dll/win32/shell32/lang/zh-TW.rc	(working copy)
@@ -614,6 +614,20 @@
     PUSHBUTTON "Cancel", IDCANCEL, 167, 181, 50, 14
 END
 
+IDD_NOOPEN DIALOGEX 0, 0, 240, 75
+STYLE DS_MODALFRAME | WS_POPUP | WS_CAPTION | WS_SYSMENU
+CAPTION "Caution"
+FONT 8, "MS Shell Dlg"
+BEGIN
+    ICON IDI_SHELL_DOCUMENT, IDI_SHELL_DOCUMENT, 5, 5, 21, 20
+    LTEXT "This file could either be used by the operating system or by\n\
+another application. Modifying this file might damage your\n\
+system or make it less functional.\n\n\
+Are you sure you want to open this file?", IDC_STATIC, 35, 5, 230, 60
+    DEFPUSHBUTTON "Yes", IDYES, 125, 55, 50, 14
+    PUSHBUTTON "No", IDNO, 180, 55, 50, 14
+END
+
 STRINGTABLE
 BEGIN
     /* columns in the shellview */
Index: dll/win32/shell32/shresdef.h
===================================================================
--- dll/win32/shell32/shresdef.h	(revision 65618)
+++ dll/win32/shell32/shresdef.h	(working copy)
@@ -288,6 +288,7 @@
 #define IDD_OPEN_WITH    24
 #define IDD_FORMAT_DRIVE 25
 #define IDD_CHECK_DISK   26
+#define IDD_NOOPEN       27
 
 /* Not used dialogs */
 #define IDD_FILE_COPY            27
Index: boot/bootdata/hivecls.inf
===================================================================
--- boot/bootdata/hivecls.inf	(revision 65613)
+++ boot/bootdata/hivecls.inf	(working copy)
@@ -37,6 +37,7 @@
 HKCR,".386","",0x00000000,"vxdfile"
 HKCR,".vxd","",0x00000000,"vxdfile"
 HKCR,"vxdfile","",0x00000000,"Virtual Device Driver"
+HKCR,"vxdfile","NoOpen",0x00000000,""
 HKCR,"vxdfile","FriendlyTypeName",0x00020000,"@%SystemRoot%\system32\shell32.dll,-157"
 
 ; Animated Cursors
@@ -86,6 +87,7 @@
 ; Dynamic Link Libraries
 HKCR,".dll","",0x00000000,"dllfile"
 HKCR,"dllfile","",0x00000000,"Dynamic Link Library"
+HKCR,"dllfile","NoOpen",0x00000000,""
 HKCR,"dllfile","FriendlyTypeName",0x00020000,"@%SystemRoot%\system32\shell32.dll,-163"
 HKCR,"dllfile\DefaultIcon","",0x00020000,"%SystemRoot%\system32\shell32.dll,-154"
 
@@ -260,6 +262,7 @@
 ; System-Files
 HKCR,".sys","",0x00000000,"sysfile"
 HKCR,"sysfile","",0x00000000,"System File"
+HKCR,"sysfile","NoOpen",0x00000000,""
 HKCR,"regfile","FriendlyTypeName",0x00020000,"@%SystemRoot%\system32\shell32.dll,-171"
 HKCR,"sysfile\DefaultIcon","",0x00020000,"%SystemRoot%\system32\shell32.dll,-154"