Click on the last option in the menu, ‘Properties’ and then ‘Local Files’ at the top. Verify the integrity of your game files – to do this, go to your steam library, find the CS:GO entry and right-click on it.

Sometimes temp files can cause verification problems, and restarting clears them. Restart your PC completely and try again.

Restart your PC – it’s a common solution, but one that works.

If you use family share with a VAC banned account, the same thing can apply. If there is one (no matter how old) you won’t be able to play on VAC protected servers or in VAC protected games.

Double-check there is no VAC ban on your profile.

We recommend you try these in order – most times the ‘Matchmaking Failed – VAC was unable to verify your game session’ error can be resolved with the first few. How to fix the VAC verification errorĪssuming you have no VAC ban that prevents you from playing, here are several steps you can take to try and resolve the problem. If your account has a VAC ban and you can’t verify your game session, that’s that. There are no appeals, nor are there ways to get unbanned, ever. If so, there’s nothing you can do – VAC bans are issued automatically based on detected cheats and changes to game files. One of the reasons you could see the CSGO VAC was unable to verify your game session errors is that you’ve received a VAC ban.

These bans prevent the player from playing on VAC-protected servers, and also affect whether a user can trade and sell things on the community servers. When an account is found to have made a violation, they receive what is called a VAC ban. It monitors for forbidden programs, known exploits and hacks, and so on. Valve’s Anti-Cheat software is the tool Steam and Valve use to root out and punish hackers and cheaters.

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