I have MW3 for the pc. I played it for months with no problems, stopped playing for a few months then came back. Now every time I join a lobby, when the lobby merges, my mouse freezes (while the other players are loading their map). Then roughly 30 seconds later, my map starts to load (which also takes way longer than it used to). Once I get into the game, it runs great. When the match is finished, and it goes to place the players back in the lobby, I also lag solid for 20 seconds or so. This happens without fail every single match. I have reinstalled windows completely, reinstalled the game, reinstalled steam, checked all drivers etc. I installed once from the cd, and once from steam download, to see if maybe I had a scratch causing a corrupt file. There was no difference, and the same problems occurred with both install methods.
I have windows 7 home premium 64bit My pc is a Gigabyte M68MT-S2 with 8 gigs of ram and an AMD FX 4100 Quad. Direct X 11. The graphics card is a Radeon HD 6670.
I know some may say "Oh it's radeon, they suck". But I never had this problem before.
I have researched for days and tried dozens of solutions from users including but not limited to the above mentioned, as well as deleting particular files in the steam folder, and every other solution on the interwebz.
I hope that someone has had a similar problem and hopefully a solution. I appreciate any responses.