My computer freezes almost every day. Sometimes twice.

[GiantBuddha]

So I have a chronic problem with my PC which has been intermittently occuring since I got it four years ago. Obviously, it's something I should have found a solution to earlier, but I didn't.

Anyway, my computer frequently just freezes up and I have to reboot it. This was always annoying, but not such a big deal until I started playing around 25K hands a week. Having the computer crash while I'm playing twelve tables is not so cool. It's gone weeks at a time without freezing, but lately it happens a couple times a day. It's to the point where I'm considering just buying a new machine or reformatting and reinstalling on this one.

Here's some specs and such:

OS: Microsoft Windows XP Home Edition
Dell Dimension 4600
BIOS Version/Date: Dell Computer Corporation A06, 10/08/2003
SMBIOS Version 2.3
RAM: 1 GB
Hard Drive space: 186GB
Graphics Card: ATI Radeon 9550
Two monitors: Planar 20" and Dell 17"

I used to get a blue screen which said something about the BIOS, but now the mouse pointer just gets stuck and I can't do anything. The tables sometimes still keep going, though. I'm fairly certain this isn't a problem involving the poker client since it happened before that and still happens when I'm doing something other than playing poker.

Any help would be immensely appreciated.