launch error

[Cxstorms]

hello, I followed the tutorial to install BO2 except that at launch I did not get a path error but the game launched in my application bar except that when I clicked on it the game launched for 2s then I returned to my office.
Could you explain the problem to me please?

[Resxt]

How to fix black screen on launch?
Go in the bootstrapper command prompt (the console opened when you start the game)
and paste this (right click) r_fullscreen 2; vid_restart then press Enter

[Cxstorms]

Resxt said in launch error:

r_fullscreen 2; vid_restart

thx