I have had this problem for several months or more, in a dos shell (window) trying to run any applications such as ipconfig, chkdsk, results in "Access is Denied", can run dos commands such as "dir" etc!
I have tried restoring permissions to the system32 folder, restoration is restored but didn't fix the problem.
Any ideas on this problem?
Edit:
I have just checked the "Prevent access to 16-bit applications" policy and is "Not Configured", tried changing to Disabled but no change!
I'm using XP Pro.