Interesting Error!

Hello,

I need some help! Well its kinda of confusing but this is my scenraio:


I used to play corssfire with no lag, no errors, Pc runs fine. But lately randomly during games my internet cuts ouf (Turns off) and then when i exit the game I cannot find my wireless router (or others). But it also does the same with an Ethernet cable, after a few seconds of playing i simply cannot use my network adapter. I have scanned hundreds of time with Norton, fragmented my PC, even checked for system errors - none. I've got up-to-date software, windows packages etc. So is it a hardware failure?

I usually get 80 FPS, with 25 ping. I've tried game booster premium, ive tried all options i found on the internet. My IT professor thought it could be a battery problem?? I swaped batteries with my friend (yes its a laptop) but still it continues. I dont want to but a new laptop or PC as this one is fine for my studies, but CF has been acting out lately!

Would appreciate any professional help, i need it!

If you want me to run any tests from tools / downloads, i will do it!