PC hangs when requested to shut down

  I'm geting an error message ""This application or DLL is not a valid windows
image. Please check your installation diskette." This is followed by the
message "Could not load the DLL library C:\windows\system 32\zlcommand.dll.
Access id denied"
 
PC will now not shutdown by itself and hangs.
 
Anyone have any solution?

Do I need to reload XP, and will I then lose all my updates including SP2?
 
Now won't accept any updates, and still hangs.
Operating System: Windows XP Home Edition SP2

 "zlcommand.dll" is not a valid Windows dll.
Scan your system with latest versions of anti-spyware utilities so as to
remove spywares/malwares.Scan it in Safe mode.

regards,
S.Sengupta[MS-MVP]

Robbie Fricker wrote:

  The zlcommand.dll is I think something to do with Zone Alarm which I was
updating when the original problem ocurred, and which I think is part of my
problem.

Regards

Robbie

"S.Sengupta" wrote: