Hi
My computer hangs frequently..i mean nothing works not even mouse..i had
to restart each time. I doubt if there is something to do with my harddrive
because..sometimes while booting it stops with motherboard screen..if I shut
down and restart after some time it works properly..I have a dual disk dual
boot with windows XP and rhel on each disk.I had formatted my disk repeatedly during the
summer. I know that would reduce the life of the drive but it's too early
for this drive. Did nebody encounter this kind of problem? Please help...
TIA.

You memory might have gone bad, my machine crashed randomly when my cheap memory modules died.
Test them with memtest86+ or something similiar, or try removing some memory modules to figure out which one might be broken.