

Method 5: Exclude the game directory from antivirusĪnother trigger mechanism for the error code “VAC was unable to verify your game session" could be the antivirus software which is likely to be installed on your Computer System.Antivirus software scans and repairs tabs, applications and Documents including CS:GO System or Directory Files. Users stated that this simple method has been proved effective when running into the "VAC was unable to verify your game session" error code.


Due to possible server timeout is it recommended simply restarting the steam client. If verifying the integrity of the game's files is not the solution to the error code there is a possibility however that the Steam client itself might be the cause. If this occurs simply click “Ok” and the Steam client will automatically start downloading those files again for your game to work properly again.After completing the mentioned steps, participating in matchmaking matches should work again, and the "VAC was unable to verify your game session" error should be gone.However, if the error is still occurring there are other methods to fix this complication caused by the Valve Anti-Cheat System. Once the validating of the files is complete there could be some missing or corrupted files. This process might be time-consuming as the Steam client is checking every single file of the game.
