When i try to start TF2 nothing happens. My icon turns green and then back to blue. I reinstalled it and it happend again. I checked the Files for error and steam says that there are 4 files that need to be newly requested . I asked one of my Friends to send me his TF2 folder and i started to work again. Today the problem is back and it really ♥♥♥♥es me off. Does any of you know how to solve this problem?
UPDATE: I already fixed. My Anti-virus was causing this problem.