Lag And Lots Of It - Spyware Doctor

I dled a game and installed (gta VC) and also installed "the all seeying eye" and "MTA version(i dont know)", during playing the game i encountered this massive lag/frame-skip every/approx 10 secs, i exited the game and found that the lag/frame-skip still continued, i reseted my computer and to find it was resloved, where after about 30-40 mins the continous lag came back, its starts of as small frameskips to over a long period of time (1 hour) unbearable frame skip as if the computer is running at full. I did a virus scan, adware scan, spy doctor scan, cws shredder scan and a hijack this scan. Only Spyware doctor found 700 things that it removed the most threatening thing a browser changing trojan/hijack thingy,still my comp has the constant lag/frameskip.