I've had some issues with tf2, i've started it one time today and it ran fine but after that session, as soon as I open it there's a black screen that lasts for a long time and when the loading image comes it lasts more than usual, sometimes it even crashes I also can't alt-tab, and if I am able to get in a game or load a local server the game starts lagging and freezing and crashes afterwards, i'm trying to reset it to default but couldn't delete my cfg file (it says it's being used by another program) and then i've trying verifying integrity of game cache (I think i messed up) and now it has a 17kb download that won't even start
http://prntscr.com/fux1k2