Weird Pc Lag

[pompario]

Hey guys, ex-lurker here in need of some help. A couple of days ago i noticed my PC lagging when watching an HD movie, it was annoying but I didn't think anything was particularly wrong until i started playing DOTA2, it was impossible to play it was stuttering badly, and this had never happened before. At first I instantly thought it was my gpu since an error appeared, so I reinstalled the drivers and ran some tests but this kept happening, even if it was only on the homescreen my mouse was really slow. Ive ruled out RAM failure (memtestx86) and ran several other tests. I honestly dont know whats the problem might be the psu any ideas? Since ive disconnected some stuff conected through usb ive noticed it get better, but im not sure if its gonna come back.

CPUZ report http://pastebin.com/JbKpTwZ2

CPUtest report http://pastebin.com/Siw0bR69

HWM report http://pastebin.com/mZNc6gsd

HDD report http://pastebin.com/dSdcVLkP

EDIT: After checking my resource monitor I noticed some strange applications taking A LOT of cpu, and pushing it to near 100% levels, seems I had some cudaminers (bitcoin miners), im running Malwarebytes-Anti Malware and MSE to remove them, hopefully that will solve the problem!

Specs: Asus P8Z77-I deluxe mobo
Msi Gtx 660ti
i5 3570k OCed to 4.0 currently on 3.8
Gskill Ripjaws 8mb (4x2)
case sugo07 (with psu)
Ive got a cpu cooler (cooler master) cant remember the ref though
HDD WD Caviar 1tb (ref in report)

 

[NewYorksFinest]

Is it only the HD movie? Test it on some games, if the same "lag" happens it is your GPU dying. The PSU wouldn't be a problem as it doesnt happen on the Internet (I don't think so.)

 

[pompario]

I tested it on Dota2 online and it stuttered a lot, after cleaning the case and reinstalling nvidia drivers I tried playing with bots and it still stuttered, after I disconnected an external HD and my ipad from the pc it worked fine, thats why im worried its the psu. I will run crysis and see how it goes and then report back. Thanks!