System interrupt is using 100% of my processor all the time. I googled the issue and it seems to be a hardware driver related issue. I downloaded Windows Performance Analyzer (Xperf) and ran it to look for what was exactly causing the problem, it seems to be ataport.sys, but I'm not sure exactly what im looking at. Anyhelp would be appreciated. If anyone is willing I can send my Windows performance recorder file so you can take a look.