Screen fault with PC?

[Nick]

AHH the joys of running windowz. Maybe you should clean them more often :-D.

I've seen similar on Linux. Basically it's typically a driver mishap, i.e. a software issue. With any OS, the low level driver code is supplied by third parties - in Linux's case, everything bar the kernel itself is "third party"; for Windows, the add-on hardware (e.g. video card) manufacturers supply the miniport (hardware specific) drivers - Microsoft only supply the default/generic/fallback drivers.

All software, whatever environment, will have issues at some point.