I joined a steam server and got the message This server is enforcing consistency for this file models/infected/hulk.mdl" Ok, I figured its their server and they have rules. So, I then started my own game, on a local lan and got the same message, even though I started the server up.
I then tried to join a game my son started on a local server and got the same error message.
Ok... so i figure i will just play a game by myself, and NOPE, I get the same message.
I cant seem to play any left for dead games. and i have not tired any other games yet

Im trying something i found on line, with verifying game integrity and hoping this is what needs to be done.
Anyone know what caused this?? Id like to make sure I do not do this again if possible