cmd.exe commands doesnt work anymore

[Guest]

After updating Vista Ultimate with Windows Update, I cant use any of my
commands! help...NO! slmgr...NO! even format....NO! Anyone got this problem?
(my buddy does)

 

[dean-dean]

Does "Run as Administrator", by right-clicking on Command Prompt, work?
Does the same hold true for invoking commands in Run (Start
Menu\Programs\Accessories) and Command.com (C:\Windows\System32)? If those
work, try this command in Run:

sfc /scannow

which might repair Windows. The System File Checker checks all the current
system files and can restore the cached approved copies.

 

[Guest]

Interestingly enough, commands do work except when using standard-user token
for running cmd.exe