
Being an online multiplayer game, CS:GO players often face one or the other issue due to problems arising from the client PC or Valve’s server. One such problem causing a headache among most players in recent times is the “CS:GO VAC Was Unable to Verify Your Game Session.” As the name suggests, it is a problem linked to Valve’s anti-cheat system not recognizing and verifying any of your games. The most common solution for fixing the CS:GO VAC Was Unable to Verify Your Game Session error includes Updating the Steam Client, checking the integrity of your game files, and reinstalling the game.
How to fix CS: GO VAC Was Unable to Verify Your Game Session.
The following are some of the most commonly deployed workable solutions for fixing the error at hand.
- Updating the Steam Client: According to several Redditors, the most common fix for the problem is to update your Steam Client. Open your Steam application and click on the Steam section from the main bar. Under that section, look for the Check for steam client updates.

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- Verifying the Integrity of the Game Files: Verifying and repairing corrupt files may also fix the issue since VAC is a part of the game files. Use the “check integrity of game files” option to repair any missing or corrupt files. Steam > CS:GO > Right Click > Properties > Local Files > Check Integrity of Game Files.

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- Running the Game With Administrative Rights: Being an anti-cheat system, VAC requires administrative privileges for proper functioning. Provide the prescribed rights for the application by right-clicking and visiting its properties section.
- Reinstalling CS: GO & Steam: If none of the above methods work out, as a last resort, try to reinstall the game & Steam client on a different drive to your previous directory.
Remember, if the problem persists for more than a week, try to contact Valve support to get a custom-tailored solution for you.