My computer lags horrendously whenever I click on the LAN or multiplayer tab and it connects to the internet. I have a feeling it might have something to do with my new video card and/or hard drive that were recently installed in the last 2 weeks. My firewall is turned off too by the way. 3 weeks ago, I was able to play these games perfectly online, no lag. My computer can handle Half Life 2 on max settings, yet it lags when I play Starcraft on multiplayer, so obviously somethings wrong.