Steam wont launch Team Fortress 2

[SirYuzu]

Since yesterday,im having this problem where I cant launch Team Fortress 2.
It says that the game is running but I dont have TF2 running.
http://prntscr.com/8m59rc

I tried ending hl2.exe,and closing the Steam Client web helper but that kept popping up so i gave up.
Later I tried ending it by using Process Explorer,and I did found hl2.exe still running (when I open task manager it wont show hl2.exe) but when I try to kill the process it says "Access denied" even when I tried it with administrator.

And the last thing I tried was from command prompt,I typed taskkill /pid 7668 (hl2.exe's pid) /f (forcekill task) but it says there's no task with that PID running.

Any help please?

 

[ss202sl]

reboot

 

[johnnyb105]

Also go in and re verify your files for the game as well if they don't work delete the game and re - download it.

 

[SirYuzu]

I cant quote for some reason but none of those worked.

 

[johnnyb105]

Try deleting steam itself then re install it....