My problem, however, is fairly difficult to explain and with such i'm assuming it isn't normal. Basically, in 3D games these little square green based figures start overtaking where another graphic should be until eventually the screen freaks out and gives some sort of scan line effect with giant spiky renders flipping and spinning all over the place. (and rather quickly on some more intense games, ie Guild Wars took under 2 minutes)
Ultimately, it requires a reboot to rid of it.
Should i take my computer in to get checked or is this likely an issue with graphic settings?