This topic was dealt with in July; I have similar problem only my computer is a laptop.
I'm wondering if the suggested compressed air cleaning would be an option here.
Windows XP--Service Pak 2, 512 RAM, 1.8 GHz, Pentium 4, Satellite broadband.
Gaming slows, even stops at times. Now and then I'm booted off the game site completely. (typically pogo.com).
Thanx for any suggestions! Wandasue