The other thing i forgot to mention was that the same problem occurs when i'm playing back files (.mpg, .dat...)
It seems that i cannot be watching any movie files/disc for too long (no longer than 15-20mins), otherwise it will just lockup.
Also when it freezes, everything else seems to be still working. e.g. music still playing, transfer still going...
its just the mouse, keyboard, and the screen.
I'm thinking this could be the video card problem! Creative GeForece2 MX (AGP) with the nVidia Detonator3 driver installed. Could this be the problem?