Game getting random fps spike lag every 3 secs?

Lerpasaur

Honorable
Oct 12, 2012
4
0
10,510
So, my computer and when I played games was working perfectly, was running very smooth. But now, it has a spike FPS lag very 3 seconds and I'm about to strike my screen with my fist. Please help! :D

(Just try to help, don't post me about buying anything else.)

Specs:
Processor: AMD Sempron(tm) 140 Processor 2.70 GHz
RAM: 3.00 GB
System Type: 64-bit Orperation System
Video Card: ati radeon hd 4350

;(