my l4d2 has randomly broken

[Blu]

i have unsubscribed from all mods and checked the game chash (and im going to do that again) but the application will not start even thought the .exe is launching. its not a specs problem although it might be eyefinity derping it out. if you have any sugestions please tell me because i paid for this game and would like to be able to play it

[shreddedbullet]

Do you have X-Fire installed. if so, make sure it closed, because X-fire used to crash many of my games. That's why I uninstalled it.

[Blu]

its not that they crash its that the .exe turns on but no window ever opens its like the .exe wont launch the game window i never hear or see l4d2 anything but the .exe in task manager