Decent Computer Crawls at Snail's Pace

Hey.

Recently I installed some new memory, a new hard drive, and a new power supply (reason: the old one exploded due to power surge). Since then, my computer has run sooooo slowly. It freezes if I am doing to many things at a time, pauses often when I am changing fields in a form, and Outlook Express takes ages to start up.

Worse, when the computer freezes and I have to reset it, the hard drive scan tells me that there is an error on the hard drive that cannot be fixed! And I left the computer on overnight defragging and got up to find that it was still stuck on the "scanning for errors" phase! What's going on here?!!?!?

Pllleeeease help me, I want to get this resolved as soon as possible.

 

The first thing I would try is removing the new memory and test the PC. The run ScanDisk from MS-DOS mode.

Syntax:

SCANDISK [d: [d: . . .]|/all][/checkonly|/autofix[/nosave]|/custom][/surface]

Try:

SCANDISK C: /autofix /surface