First have you run a adware/spyware proggy on it and do you have a anti virus and is it updated?
Ya my anti virus is updated, i have Norton but just recently got AVG cuz ive been hearing alot of bad things about Norton.
At first i thought that i was getting these errors cuz my graphics card had somehow shorted out and was getting overloaded therefor needing to shut down my games, but then it started doing it to my Internet and my ICQ messenger......strange though that my AIM never gets an error message when i use it. Now im starting to think its a worm or some weird virus cuz when i go to add remove programs i get an error message that says Run DLL App needs to close.....and my computer randomly restarts at anygiven time and then I get an Error message saying my computer has recovered from a serious error. I have done virus scans, spyware scans....i got nuthin :\