Hi,

For starters, that should be the HKLM branch, not the HKCU branch, and your
key is entirely the wrong path. It should be:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon

Note that this is the "Windows NT" key, not just "Windows", and not the
"Explorer" key but the "Winlogon" key.

Try changing it there. As Malke has pointed out, you most likely have a
serious infection which is best attacked from outside of Windows.

--
Best of Luck,

Rick Rogers, aka "Nutcase" - Microsoft MVP
http://mvp.support.microsoft.com/
Windows help - www.rickrogers.org
My thoughts http://rick-mvp.blogspot.com

"Phadima" <Phadima.39jlsf@no-mx.forums.vistaheads.com> wrote in message
news:Phadima.39jlsf@no-mx.forums.vistaheads.com...
>
> Hi all
>
> Its been 5 days since i have locked out of my pc (vista home).
> *Problem:*
> Switch on PC, Choose any user from list, after login, i get a black
> screen. After searching i found my way to the registry using F8->Repair
> .->Command promt->regedit.exe
> In there i found that the everytime i change
> [*HKEY_CURRENT_USER\Software\Microsoft\Windows\Curr entVersion\Explorer\Shell*]
> to explorer.exe, and restart my pc, it changes to *cmd.exe /k start
> cmd.exe* .
> i dont know what to do now. The following didnt work:
>
> - CTRL-ALT-DELETE/CRTL-SHFT-ESC to show task manager
> - Safe mode
> - System restore and repair
>
>
> --
> Phadima
> Posted via http://www.vistaheads.com
>