Aha. I have a new graphics card, and now my PC really flies (*groan*) I no longer have the fear. (unfortuately, the new graphics card was too puch for the old motherboard, which promptly melted, so now I have a new one of those too. So far KSP has cost around 350 pounds.... The new motherboard LBAs the disk differently, and stWindows "Fixed" my filesyste, so I've lost all my ship designs. as well as another 83% of my drive contents)