Okay so The other day I wanted to get a marathon of MW2 going to help narrow down the issues. I played probably a total of 15 games with breaks but never turning off and exiting the game.
Here's the key: I did not open up in game steam to talk to friends or start voice chat. when normally using the in game functions the problems would start to occur after 2 or 3 games, I went through 15 games with no issues.
Later that night, I came back on, entered a voice chat with my buddies and boom the problems started.
I reinstalled steam. No improvment. If this is the issue, is there anything steam could do for me to help?