Yesterday opened msconfig and when I went to make a change, something I've done previously with no problems, a box came up saying access was denied and I needed administrator privileges or something to that effect. It did, however, make the changes I requested, despite the access denied message. I really need to clear this up, as I have a game (FSX) that also won't install, and I suspect somehow it also thinks I'm not the administrator.
I AM the administrator of the computer and verified this. I ran a virus scan and a pest scan. Both are clean. I don't use Zone Alarm, which some people have reported to cause this problem. Would appreciate any help to rectify this.