Phadima wrote:

>
> 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

My guess (because I can't see the machine) is that your computer is severely
infected which is why the shell setting changes upon reboot. Since you
haven't told us anything about your computer and its recent history (except
that you've had this problem for 5 days) or your security/antivirus
protection, that's about as specific as I can guess.

You could try booting with a Bart's PE with an antivirus plugin and scanning
from there. Or you could pull the drive and attach it to a working computer
running XP or Vista and use the installed av to scan it from there.

Standard disclaimer: I can't see and test your computer myself, so these are
just suggestions based on many years of being a professional computer tech;
suggestions based on what you've written. You should not take my
suggestions as a definitive diagnosis. If you can't do the work yourself
(and there is no shame in admitting this isn't your cup of tea), take the
machine to a professional computer repair shop (not your local equivalent
of BigComputerStore/GeekSquad). If possible, have all your data backed up
before you take the machine into a shop.

Malke
--
MS-MVP
Elephant Boy Computers
www.elephantboycomputers.com
Don't Panic!