i recently instaled windows 7 but it frequently restarts and sometimes de screen flickers. before i had windows xp and it didn't have any problems. also windows doesn't see one of my partitions. i have 2 hdd split in 5 partitions. it also gave me a blue screen once and it froze another time. it restart unexpectedly and very often. can anyone help me?

thank you

Yes i did, and it didnt show any problems. i have amd dual core, 7800 gt, 4gb ram dual channel.

try update the video card driver of your PC...