help , my PC is dying.

I am using Win XP. I got a bad problem today.

All it does is keep on dumping physical memory (blue screen) with remark:
STOP: c0000218 {registry file failure}
The registry cannot load the hive
\SystemRoot\System32\Config\SOFTWARE
or its log or alternate.
It is corrupt, absent, or not writable.
Beginning dump of physical memory
Dumping physical memory to disk:

This process keeps on going until I get sick and tired and shut down the power altogether.

Can anybody pls help.

Thanks in advance.