Memory and HDD's broken diary

First, I found my HDD had many bad sectors found by HDD regenerator.
I tried to use HDD regenerator to recover the HDD, but it's speed was so slow to scan 86 sector in a hour. So, I stop it after last....

I gave it up after tried and tried full of a day. But after this, I found my OS was restarted ANY time!? When i double-click my folder, restart. When i open a menu, restart. When i BURNED disk for backup, restart.... But thanks someone, my PC got a big BEEEEEEEEEEE when i entered XP.
I shocked by this. (cont.)