... memtest86,download the windows iso and burn it to disk and boot computer to the disk it creates ,run the memtest for at least 5 or 6 hrs ,my opinion . ... just click on the iso file and win7 should popup to burn it to a disk
I tried to reinstall safari
but this problem not happen in safari only ! with office, firefox, media player, .. everything except sticky notes :|
and I tried to reinstall windows 7 from the same CD , and another CD
but nothing happened !