TOSHIBA Satellite A200 problem

Hello,
I have a problem with my TOSHIBA Satellite A200-258 ref PSAE6E-0DX021FR (Core 2 Duo T5450 1.66GHz 2GRAM), this PC crashes often and hard driveLED stays on for a few seconds (5 to 8s) I multiple operating systems (Vista, XP SP2) but still the same problem as I have updated BIOS (no change) I recently found that there is a difference between the frequencies of processor cores (shown in the ownership of the job) I see it sometimes 1.66GHz 980MHz and when I restart my PC becomes normal (1.66GHz 1.66GHz) . What do you think to do in this situation?

Hi,

Looks like a HDD failure. Is this a temporary blocking ?

thank you for your reply

The blocking of the hard disk is temporary and does not require a reboot of the PC during the blocking I can not do anything even Cannot Press CTRL + ALT + Delete, all my commands run after the restart,

It is perhaps not the disc while In my opinion a program works from time to time and it blocks everything else, only for what?

Doing a test:
You gonna put the task manager in action before the bug. You do a Ctrl + Alt + Del "and you open on the " Processes " tab, stretch the window to see everything and wait for the bug. When it happens you look at the process that uses the full capacity of your processor.