Internet/downloads stops when playing a game

Hi,

I've been experiencing this problem for a few days now, everytime a play a game (I've tried it with Warcraft 3, Starcraft 2, Dragon Age and DMC4), single player or online, windowed or fullscreen: my downloads stops (be it torrents or downloads from my browser - or basically my internet, atleast that which is not part of the game, shuts off). I can play online games fine though.

I even tried to play a game in windowed mode and every time I make the game my active window, i watch my download speed dwindle to zero and up again as I minimize the game. This happens even in single player games in warcraft 3.

Any ideas to point me in the right direction?

Ive tried updating both my wireless card and graphics card. I turned off windows firewall and my anti-virus. No malwares too. OS is Windows 7 64.

Any help would be greatly appreciated. I've searched the net for similar problems though i did find a few people experiencing the same problem, no resolutions have been posted. I'm contemplating an OS reinstall, but just as a last resort.

Specs are as follows:

Phenom II X3 720
Radeon 5770
Linksys WMP54G
MSI 785GM-E65
 
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