Start a command prompt and set the following variable: set devmgr_show_nonpresent_devices=1 Start Device manager from the command line: devmgmt.msc On the view menu, click Show hidden devices . More info here: http://support.microsoft.com/kb/315539
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Create a text file called Show Desktop.scf containing: [Shell] Command=2 IconFile=explorer.exe,3 [Taskbar] Command=ToggleDesktop More details here: http://support.microsoft.com/kb/190355/en-us
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I've found this quite useful in debugging slow logins or incorrect application of group policy. Create the following DWORD value: HKEY_LOCAL_MACHINE\Software\Microsoft\Windows NT\CurrentVersion\Winlogon\UserEnvDebugLevel Set: 0x00030002 - Masses of debug
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Create HKLM\Software\Microsoft\Windows\CurrentVersion\Policies\System\verbosestatus It needs to be Dword with a value of 0x1.
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