My father has been having this problem for a year now. His computer will just freeze up randomly (no mouse, Ctrl+Alt+Del or anything). We then discovered it semed to happen whenever Flash was being shown in a browser or in his Flash creating program. He recently thought it might be his cordless optical mouse. But it still froze. He then discovered he had 4 things on the same IRQ (including his video card) and two of them were unknown multimedia and video controllers. They turned out to be an ATI TV-Wonder capture card and when we removed it they went away. He deleted his device driver and reset the computer and it installed again and still it freezes. I think the fourth thing on the same IRQ was a USB controller or something. But it doesn't say its conflicting and I don't think that has anything to do with viewing Flash.

He has a nVidia Vanta LT. 1Ghz computer (not sure how much RAM). Anyone have any thoughts?