click on the "show processes for all users" box to show the rest of your items that are running in the background. If it is a fresh install of XP, it is likely windows updates are running. Failing that, use Kapersky's TDSSKiller (rootkit killer - free) to check for a rootkit. You can also use something like Hijack This (again - free) to see what all is starting/running on your computer. Hijack This is a powerful tool, but can cause damage to windows if you delete something needed for windows to operate.
Small side note, from the picture this looks like Win7... not that it would change my answer.
So I ran Process Explorer and discovered that the problem I'm having now is the same as before when I had Windows 7 64 bit running, System Interrupts is the culprit, more specifically it was the USBPORT.sys causing the Interrupts (Before I installed XP).
Anyone know what to do here?
UPDATE: I disabled my wireless card to stop it from connecting to the router as I've read that a router/modem can cause high interrupts and that didn't help at all.
I reinstalled most of it as soon as updates were done. But like I said, I narrowed the problem down to the USBPORT.sys, which went away when i stopped using these 2 usb ports on the main board, working for now.