Fix CS:GO "VAC Was Unable to Verify Your Game Session"

CS: GO has recently grown in popularity, with the number of players increasing daily. The game's popularity has skyrocketed since it became free to play. Recently, some players have been having a lot of trouble with a very common issue in the game. When they start the game, they get an error saying, " VAC was unable to verify your session." Some players believed the error was due to a VAC ban, while others thought the culprit was hidden on the backend.

VAC, or Valve Anti-Cheat, is the game's built-in cheat detection mechanism that detects and punishes hackers and cheaters. When you get verify game session error, it is most likely because some files are found corrupt, preventing VAC from verifying the game's source. If you are experiencing the problem and unsure how to resolve it, this article has covered you.

"VAC was Unable to Verify Your Game Session" Error

To fix this problem, you must first understand how VAC works.

This software works with Steam to track down players who attempt to enter a game session while using a hack or cheat software. This suspicious attempt not only detects an unallowed program or script running alongside the game but also detects abnormal changes to the game files. When the software detects unfair play, the user is immediately banned.

As a result, the error message "VAC was unable to verify your game session" appears on the screen. This indicates that VAC, an anti-cheat program, could not verify your game session. Usually, it's because a third-party program or script tried to alter the game processing or Tempered game files, which caused problems in your game verification.

Perform Some Preliminary Checks

Perform some preliminary checks if you still need to do so.

• Leave your game session, restart it, and try again to matchmake.
• Relaunch the Steam client.
• After logging out, re-enter your Steam.
• Restart your Windows computer.
• Disable Windows Defender or any other antivirus software you use, or allow the Steam client and directory folders.
• If you've been using a VPN, now is the time to disconnect.

If none of these steps work, it's time to look for another easy solution.

Fix 1. Reboot Your Computer

Some apps and processes (such as disc indexing) on your computer are responsible for accessing your game files, causing VAC to fail to verify the files. This can be resolved by rebooting your computer. Take the following steps:

Step 1. Close all applications and windows.

Step 2. Press the Windows key on your keyboard, or click the icon in the lower-left corner of your screen.

Step 3. When the Start menu appears, click the Power icon. Then press the Restart button.

Step 4. After restarting your game, check to see if the error has been resolved.

Fix 2. Run the Game as an Admin

Running the game as an administrator prevents the game from crashing due to a lack of permissions. Here's how to go about it:

Step 1. Right-click the.exe shortcut file for the game on your device.

Step 2. Select Properties.

Step 3. Go to the Compatibility tab.

Step 4. Check the box Run this program with administrative privileges.

Step 5. To save the changes, click "OK".

Fix 3. Verify Integrity of Game Files and Restart PC

To fix this, startup Steam, navigate to the Library, right-click Counter-Strike: Global Offensive, and then select "Properties".

Step 1. After you've opened the properties window, navigate to "Local Files" and click the "Verify Integrity of Game Files" button.

Step 2. CS: GO's Local Files tab has a button for "Verifying the Integrity of Game Files".

Step 3. Allow this to finish before restarting your computer.

After completing the steps outlined above, your CS: GO should be operational, and you should no longer receive "Matchmaking Failed - VAC was unable to verify your game session" errors.

Hope these fixes have worked to solve your current problems, and if you like the provided solutions please share this guide to help more people around you!

Fix 4. Repair the Steam Client

Another reason for this error may be that your Steam client could be corrupted or contain malicious files. Here's what you need to do:

Step 1. On your screen, click the Start button.

Step 2. Click on Command Prompt in the Power User menu that appears (Admin).

Step 3. When the UAC prompt appears, select 'Yes.'

Step 4. Copy and paste the following line. Then press Enter: "C:Program Files (x86)SteambinSteamService.exe"/repair.

Step 5. Wait for the process to complete. It'll take some time.

Step 6. Restart your computer after closing Command Prompt. Check if the 'VAC was unable to verify the game session' error has been resolved.

Fix 5. Completely Reinstall CS: GO

If none of the above fixes work, your problem is likely not one that can be solved by changing a setting or restarting your computer. While we recommend you search the web to see if anything else might work, reinstalling CS: will save you time. Reinstalling the game will resolve the issue quickly and save you from having to try a variety of fixes (which are unlikely to work).

Step 1. To completely reinstall Counter-Strike: Global Offensive, go to your Steam Library, right-click "Counter-Strike: Global Offensive," and select "Uninstall":

Step 2. Click "Delete" in the window that appears.

Then you'll have to reinstall CS: GO.

Final Words

Through this article, we hope you have found a solution to the CS: GO "VAC was unable to verify your game session" error. By putting all the solutions in one place, we made it easy for you to fix the CS: GO error in a matter of a few minutes only.