Q9300 2.5Ghz 4cpu running at 50-52% constantly

Greetings everyone, as in the heading of this I have a Q9300 @2.5GHz (4cpu's). My problem is other than mandatory things running in the background and nothing showing up in my applications tab as running my CPU Usage is ranging from 50-52% constant. The small graph on my task manager under the Performance tab shows 4 green boxes and two of the boxes, the ones on each end, are peaked at 100% while the two center ones are barely able to be seen.
Any ideas on what could be causing this. The pc is just freshly installed about 2 weeks ago. Mostly games on here except for a few odds and ends programs, Khaspersky, Mozilla, Outlook, OpenOffice, NBOS RPG Cartography software, are pretty much the extent of my non-game software.

Here is a small break down of my pc:

Windows XP SP3
4GB Corsair Ram
Q9300 @ 2.5Ghz (4cpu)
Dual Nvidia 8800 GT OC 512MB
2 Seagate SATA 300GB HD's
DX 9.0c
Diamond Extreme Sound Audio 7.1/24 Bit PCI-E

Any help would be greatly appreciated I would hate for my CPU to have a heat stroke.

Thank you,
Matthew

Nothing shows up in the applications or processes tab? Thats impossible.

Hello guys/gals. I have my windows task manager open and there are only two items under the Processes tab that show any kind of CPU usage.

System Idle Process: 50 & Memory Usage 28k
Spoolsv.exe: 50 & Memory usage 13,708k

All 28 other processes are sitting at 00 cpu usage.

Any ideas?