Index: base/setup/usetup/interface/usetup.c
===================================================================
--- base/setup/usetup/interface/usetup.c	(revision 63958)
+++ base/setup/usetup/interface/usetup.c	(working copy)
@@ -4095,6 +4095,7 @@
     PAGE_NUMBER Page;
     LARGE_INTEGER Time;
     NTSTATUS Status;
+    BOOLEAN Old;
 
     NtQuerySystemTime(&Time);
 
@@ -4296,6 +4297,7 @@
     NtDelayExecution(FALSE, &Time);
 
     /* Reboot */
+    RtlAdjustPrivilege(SE_SHUTDOWN_PRIVILEGE, TRUE, FALSE, &Old);
     NtShutdownSystem(ShutdownReboot);
     NtTerminateProcess(NtCurrentProcess(), 0);
 }
Index: base/setup/usetup/usetup.h
===================================================================
--- base/setup/usetup/usetup.h	(revision 63958)
+++ base/setup/usetup/usetup.h	(working copy)
@@ -48,6 +48,7 @@
 #include <ndk/obfuncs.h>
 #include <ndk/psfuncs.h>
 #include <ndk/rtlfuncs.h>
+#include <ndk/setypes.h>
 
 /* Filesystem headers */
 #include <fslib/ext2lib.h>
Index: base/system/winlogon/sas.c
===================================================================
--- base/system/winlogon/sas.c	(revision 63958)
+++ base/system/winlogon/sas.c	(working copy)
@@ -776,6 +776,7 @@
     PLOGOFF_SHUTDOWN_DATA LSData;
     HANDLE hThread;
     DWORD exitCode;
+    BOOLEAN Old;
 
     DisplayStatusMessage(Session, Session->WinlogonDesktop, IDS_REACTOSISSHUTTINGDOWN);
 
@@ -821,6 +822,7 @@
     UninitializeSAS(Session);
 
     FIXME("FIXME: Call SMSS API #1\n");
+    RtlAdjustPrivilege(SE_SHUTDOWN_PRIVILEGE, TRUE, FALSE, &Old);
     if (wlxAction == WLX_SAS_ACTION_SHUTDOWN_REBOOT)
         NtShutdownSystem(ShutdownReboot);
     else
@@ -832,6 +834,7 @@
         }
         NtShutdownSystem(ShutdownNoReboot);
     }
+    RtlAdjustPrivilege(SE_SHUTDOWN_PRIVILEGE, Old, FALSE, &Old);
     return STATUS_SUCCESS;
 }
 
Index: base/system/winlogon/winlogon.h
===================================================================
--- base/system/winlogon/winlogon.h	(revision 63958)
+++ base/system/winlogon/winlogon.h	(working copy)
@@ -39,6 +39,7 @@
 #include <winwlx.h>
 #include <ndk/rtlfuncs.h>
 #include <ndk/exfuncs.h>
+#include <ndk/setypes.h>
 #include <strsafe.h>
 
 #include <reactos/undocuser.h>
Index: ntoskrnl/po/power.c
===================================================================
--- ntoskrnl/po/power.c	(revision 63958)
+++ ntoskrnl/po/power.c	(working copy)
@@ -830,7 +830,7 @@
         {
             /* Not granted */
             DPRINT1("ERROR: Privilege not held for shutdown\n");
-            //return STATUS_PRIVILEGE_NOT_HELD; HACK!
+            return STATUS_PRIVILEGE_NOT_HELD;
         }
 
         /* Do it as a kernel-mode caller for consistency with system state */