scanning for steam games updates...

right so every time i go on my banned account to host lobbies it comes up with this when i try to open my game "Scanning for steam game updates"
at first i was like ok ill leave it and let it do its job
but it never goes away D:
anyone no how to fix this?
- i have tryed reinstalling the game
(only place i know where to post as i dont want to post on steam forums cas this account is banned)

try to verify game cache in steam, and then use MW2 Liberation to run the game