do you mean after your start menu shuts that you are left with a black square, if so pressing f5 should refresh your screen, it might help but it aint a very good solution. hane you tried updating your graphic card drivers, that might help. sorry i cant do better that this. you said you re-installed windows, do you mean over the top of the old windows or did you format and start from a blank h/d, if you formatted and you still have the problem then it would point to a Hardware/Driver fault. if you installed over the top of the existing windows then i would suspect a Software problem, still possibly graphic card drivers. wait a while mate and see if anyone can offer better help.