Whenever i’m downloading something either through internet or from another computer in my network the process “system” uses alot of CPU power, crippling my computer. I have used process explorer to narrow it down to ndis.sys being the culprit. But from what I can find on Google they all say that its related to the network card. However I have tried another PCI network card and also a “USB network adapter”, whilst disabling the other cards and the problem persists.
Core i5 3570k
Asus GTX 660