Index: explorer-new/explorer.c
===================================================================
--- explorer-new/explorer.c	(revision 47213)
+++ explorer-new/explorer.c	(working copy)
@@ -284,7 +284,13 @@
                    TEXT("Software\\Microsoft\\Windows\\CurrentVersion\\Explorer"),
                    &hkExplorer) != ERROR_SUCCESS)
     {
-        /* FIXME - display error */
+        WCHAR msg[] = 
+        {'t','h','e',' ','s','y','s','t','e','m',' ','c','a','n','n','o','t',
+         ' ','s','t','a','r','t',' ','u','p',' ','e','x','p','l','o','r','e',
+         'r',' ','b','e','c','a','u','s','e',' ','r','e','g','i','s','t','r',
+         'y',' ','i','s',' ','b','r','o','k','e','n',' ','o','r',' ','n','o',
+         't',' ','a','v','a','i','l','a','b','l','e','.',0};
+        MessageBoxW(NULL, msg, NULL, MB_ICONERROR);
         return 1;
     }