Solved
Game auto alt-tabing
Everytime i launch the game it automatically starts alt-tabing (and the game keeps running in the background). Tried verifying the game's data but it keeps doing the same thing. HELP
I've had this issue before with the Source Engine. In my case it was antivirus software minimizing Team Fortress 2.
Try a clean boot to see if the problem goes away. If it does, some background process is messing with the game.
