Perhaps running System Restore to a date/time prior to when the problem began will undo do it.
Also, if suspect there is malware on the machine have you tried running and anti-virus/spyware scans?
Howdy. I'm positive I have at least one virus on my computer. I can't access my Control Panel (all of a sudden the links to Control Panel disappeared in Windows Explorer) and I tried to access it through the command prompt, but I can't. After I right-click the desktop and select Properties, I it won't open. On every occasion where I try to access things on XP, I get the same message: "Restrictions" ""This operation has been cancelled due to restrictions in effect on this computer" After googling this error, I found people only had trouble with it in Internet Explorer.
I'm also very positive that it's something in the registry causing this error. How can I get rid of this? Thanks!