Nothing is quite as refreshing as a nice backup/format/reinstall! It's like giving your pc a bath, it's all new again.
Sometimes if you can't find an easy fix, home computers are just better off with the ultimate fix option. You can spend more time hunting down problems, getting frustrated than if you know when to draw the line and reinstall. Especially since this is XP, installations of XP don't last like with Vista/Win7 and slowly degrade.
Good opportunity to set up a large backup area partition if you don't already have one.
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•XBL/Xfire: Raw Kryptonite
•Logitech G27 Nixim •360 Wheel
•AMD FX-4170 •Sapphire Radeon HD 6950 2GB GDDR5
•16 GB Corsair Vengeance 1600mhz PC3-12800 •MSI 990FXA-GD65 Mobo
•X-Fi Fatal1ty Pro/Logitech Z-5500 •Win 7 64