Hardware Interrupts lagging computer

Hey guys, I just built myself a new rig with some new and some old parts from my old computer. It seemed to be working great but now I've run into a wierd problem. After leaving my computer on for 5ish hours or more without a restart my computer starts to freeze for a fraction of a second every few seconds. This causes anything I am using to start to 'skip' and make things unusable.

So I look at my processes to see what is lagging me and see that my first core is at a constant 11% usage during idle. So I use Process Explorer to see what is using that CPU and it says 'Hardware Interrupts' are using it. I don't really know what to do at this point because I've never experienced a problem like this before. (I tried resetting my bios to defaults but it didn't change anything)

Any help would be greatly appreciated.

These are my specs.
System specs:
CPU: Core 2 Duo E6600
Mobo: Gigabyte S-Series GA-965P-DS3
Graphics: ATI Radeon X1600XT
Memory: 2Gbs DDR2 533
Power Supply: HIPER 580W
HD: WD 250Gb
Drives: 2 ASUS DVD/CD drives

Fix didn't work

None of my parts are older than 3 years...

It keeps happening every 5ish hours. I don't understand.

How do I access my event log?

For the hell of it, disconnect any optical (DVD, CD, etc...) drives and see if it does it.

Woah. Looks like a cdrom error is happening every 1 second when it happens. Looks like a bad drive.

Error message:

Event Type: Error
Event Source: Cdrom
Event Category: None
Event ID: 15
Date: 5/3/2007
Time: 7:18:55 AM
User: N/A
Computer: JOHN-GAMERIG
Description:
The device, \Device\CdRom1, is not ready for access yet.

For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp.