NiceAndShy said:
The problem is that this "System Interrupts" process is using a lot of CPU as this is a 1.4ghz core2duo...
Can I reduce it from being used so much?

I used to have this all the time, probably related to a usb hub but can't disable since mouse and keyboard are attached to it. Laptop fans would be roaring and computer slows down.

My solution was to simply open Task manager, brings 'System interrupts' to top of CPU usage list. Just let Task manager sit a minute and process will return to normal (0.1%), way down the CPU usage list.