Issues with my 4670k or at least im assuming it is

I built a Computer.

alot of the time my Computer has a Hiccup. where if im multi-tasking with 6 or 7 windows 2 of the windows say not responding. my computer freezes for a couple of seconds. and then it goes back to normal. maybe cause i put to little of thermal paste on the CPU?

anyway to fix this?

heres my setup.

RM650w PSU

R9-270x x2 in Crossfire

4670k at Stock

Gryphon z87

Noctua L9i CPU Cooler.

16gb Corsair Veangeance LP 1600mhz

Your processor and RAM should handle that kind of multi-tasking quite smoothly. It depends if each of those several windows is particularly demanding. Can you open task manager and tell me what the component usage is?

Ram Usage: 14%

CPU usage 47%

this is also with a game open btw

Well that usage seems normal. Can you tell me what specific OS you are running? What -bit? Just a gut feeling.

Windows 8 - 64 Bit

All seems normal to me. I don't think it is a hardware problem, probably something in your OS environment. It's a small hiccup, I am sure you can live with. It's not a big deal. It will probably cease from happening after you do some monthly PC maintenance, with OS reinstall et cetera.

I guess. its more noticeable when i'm gaming thats' about it. thanks anyways though.