I'm having the exact same problem.
Using Ad-aware SE Pro 1.06r1.
Sometimes it even screws up my startup, keeping the Windows XP statup-menu, toolbar, and desktop items from loading.
More frequently (almost all the time), it keeps me from shuting down using Windows XP "Turn Off Computer" button. Instead I have to open up the task-manager, end the Ad-Watch process, then go to Shut-down->Turn-Off on Task Manager.
What is the problem? I know its not my system, I haven't loaded anything on this computer in about a year. I use it just to surf the net and write emails. (My job requires more paper work than computer work).
Theres gotta be other with this problem, and there has to be some sort patch or something?
Please help!