AMD Athlon 64 x2 6000 CPU
64bit Win 7 enterprise edition
Random cheap a4 tech mouse
Asus radeon hd 4850 gpu
A new random PSU 500W bought few days ago.
Ok so here is the issue, whenever I'm in game my mouse starts to lag/freeze for few seconds when I'm in the middle of it (League of Legends, Call of Duty modern warfare 3). If I unplug keyboard, it stops to lag for some reason (Tried 2 keyboards). Sometimes when I turn on the computer it freezes like crazy, for 1-4~ seconds every 5~ seconds, I just restart the computer and everything works a-ok. Changed my PSU few days ago because the fan simply stopped spinning, another thing I fixed few days ago was some weird issue with my processor. PC would randomly turn off and sometimes it wouldn't turn on for few minutes, and I noticed that if I push the CPU fan a bit, my computer would start on. To fix the issue I just took heatsink,fan apart and put it back together, no random shutdowns for few days, but the mouse issue is really annoying especially when playing FPS games. Tried the keyboard/mouse combo on another computer that runs windows XP, there were no lags (heck, I didn't run games either because it uses onboard sis graphics). Fixes I've tried so far : Change usb slots, connect mouse to USB extender (Not sure why I thought that'd work), try to install newest chipset, GPU drivers, nothing worked. I don't mind buying a new mouse, but can someone explain me why it only starts to lag in the middle of games and why does it stop to lag if I unplug the keyboard, it really doesn't seem like a mouse issue? Thanks in advance.
P.S. Sorry if I posted in the wrong section of forum, this seemed the most correct place to post it.
EDIT: The mouse lag would stay for 10~ minutes even after I stop playing the game, then after those 10~ minutes it'd disappear.