VAC Was Unable to Verify the Game Session [Solved]

You needed this article when you got stuck with VAC. This occurs while starting your favorite game. But worry not, because we are here to help you out. This article will describe five methods to fix the ‘VAC was Unable to Verify the Game Session’ error.

VAC stands for the Valve Anti Cheat System. VAC was developed for detecting and preventing gamers from using unauthorized and modified installation files or configuration files to get undue privilege and edge in popular games like Counter-Strike. Thus, VAC prevents malicious users from exploiting the workarounds of the game to get an unfair advantage over other players while playing the game.

VAC Was Unable to Verify the Game Session in CSGO

Many a time, VAC also creates false positive errors and prevents users from playing the game. Thus, even if some users are not using modified configuration files, they get a VAC was unable to verify the game session error message when they launch the game or try for official matchmaking.

Note that the fix methods described below are for users using the original game files and still getting the VAC Was Unable to Verify the Game Session error. We advise you not to use the modified version of the game or cheat enhancements. If you keep using them, not only that, you will be prevented from matchmaking, but there are chances that you may get permanently blocked from the game, and all your data is lost permanently beyond repair.

How to Solve VAC Was Unable to Verify the Game Session in Windows 10

Method 1 – Log Out of Steam and Log in Again

First of all, it may happen that the operating system or the file management system of your computer alters some of the configuration files. It will result in VAC being unable to verify them, and it throws the VAC was unable to verify the game session error.

If that is the case, just logging out of steam and logging in again will solve the VAC Was Unable to Verify the Game Session problem. When you log out, all configuration files are deleted, and when you again with the same credentials, they are recreated.

Follow the steps, enumerated below,

Step 1: Firstly, select Steam from the taskbar or desktop or Start menu and launch it.

Step 2: Following, when Steam is up and running, click on the profile name to see a drop-down box appearing. Furthermore, click on the Log Out of My Account option and follow the instructions that are displayed on the screen.

Step 3: Lastly, Log in again using your credentials. In case you forgot your password, use the forgot password option to reset the password.

This simple method of logging in again is found to fix the VAC was unable to verify the game session error in most cases, if the error was caused by some lousy configuration files or settings files. It is also noteworthy that re-installing the game will not solve the problem. The same configuration files will load after reinstalling.


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Method 2 – Reboot Your Computer

Suppose that the files that need to be verified by VAC are being accessed by some system program or utility like the antivirus software. In that case, the operating system will deny VAC from accessing the file to avoid read-write conflicts. If this issue causes VAC, restart your computer.

Follow the steps to reboot your computer:

Step 1: Click on the start button to see the start menu or press the Window key.

Step 2: Click on the power button to select reboot (or restart) from the start menu.

Step 3: The system may ask to close some applications, prevent data loss save and close them, and restart the system.

Now you can open the game. See, the VAC Was Unable to Verify the Game Session error is fixed.

Method 3 – Verify Integrity of the Game Files

Sometimes, your game file is corrupt. You may give a check to verify the integrity of the installed game files to ensure that they follow the features prescribed by the game manufacturer and the steam distributors. To check the integrity of the files, follow these steps:

Step 1: Launch Steam on your device.

Step 2: In Steam, go to the Library tab to find the installed games on your system.

Step 3: Find the game which is facing VAC was unable to verify the game session error and right-click on it and Select properties.

Step 4: Click on Verify integrity of the game files option in the local tab.

Step 5: This process may take time depending on your device parameters.

After the integrity check is over, run the game again. Your game must be running well. If your integrity check result was positive, replace the game files.

Method 4 – Repair the Steam Client

There is a chance that the Steam client itself may have some damaged or broken files. It will also lead to a VAC was unable to verify the game session error.

Follow the steps given below to fix the issue:

Step 1: First of all, launch windows command prompt

Step 2:  Then, copy-paste the following command in your cmd. Importantly, we also need the double quotes:

C:\Program Files (x86) \Steam\bin\SteamService.exe /repair

Step 3: Be sure to replace the path of SteamService.exe if you have saved it in a different location.

Step 4: Run the command, and after the repair is complete, restart your device.

Step 5: Lastly, open the Steam application after the restart. You may download some files for updates or configuration. Login to steam if prompted.

Lastly, open the game. The VAC Was Unable to Verify the Game Session error is fixed.

Method 5 – Eliminate Game Directory from Antivirus Scan

VAC may be denied access to the game files if the antivirus scan is running in the background. To prevent this, you can whitelist the game and steam directory and exclude them from automatic antivirus scanning.

The steps to do this will be different for different antivirus software. You have to do it according to your antivirus software. Usually, it involves going into the settings and adding the game directory to whitelist.


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Conclusion

Hopefully, this article helped you to solve the VAC was unable to verify the game session error. Now go ahead and enjoy your game!

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