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VAC Was Unable To Verify The Game Session [Fixed]

VAC (Valve Anti-Cheat) is a component of the Valve Steam Computer gaming platform. It restricts all the gamers who use cheat codes while playing a game. It was first launched with a very famous game Counter-Strike. According to users, this platform is facing some problems during gaming sessions.

Amongst all the issues, the most discussed one is when VAC was unable to verify the game session. Here, we will discuss the reasons behind this problem and its corresponding solutions.

Reasons Why VAC was Unable to Verify the Game Session 

There are many possible reasons behind the occurrence of this VAC error. They include: 

  • An error in steam service 
  • Corrupt game system files 
  • Outdated graphics card drivers 

Let’s look at all the best possible solutions, which will help you to know why VAC was unable to verify the game session.

VAC was Unable to Verify the Game Session: How to Fix it?

All the solutions to fix this problem are given below. So, go through them very carefully. 

Check the Gaming Files

Sometimes, VAC can’t verify your gaming session whenever you play Counter-Strike: Global Offensive or similar games. This only happens when there is an issue in your game’s system files. So you need to check all the gaming files with the help of your Steam client. The steps to check on the Steam client are given below.

  • Open your Steam client and you can see the “LIBRARY” option. Click on it to display the list of games. 
  • Right-click on the “Counter-Strike: Global Offensive” option and select “Properties”. 
  • Now you will see multiple tabs present there. So, choose the “LOCAL FILE” tab and then select the “VERIFY INTEGRITY OF GAME FILES” option. 
  • Wait until the verification is complete. After that, you will see a message box showing “All Files Successfully Verified”. Then click on the “Close” button. 

After that, start your game and check whether the error persists. 

Reboot your Steam Client

You might face the error when your client program is somehow corrupted. The only solution to troubleshoot this is to restart the Steam client. The steps to restart your Steam client are as follows. 

  • Go to the Steam client and click on the “Steam” option, which is present at the top-left corner. Then click on the “Exit” option to close the program.
  • Now, open your Steam client and click on the “Steam” option. Then, select “Go Offline” to open a dialog box, where the “RESTART IN OFFLINE MODE” is present. 
  • Click on the restart option to enter the offline mode. After some time, follow the same instructions given above to enter into the online mode. 

Now start your game and hopefully, you will not face any error again. In case you face it, there are more solutions available below.

Mend your Steam Client

There is a high chance that your Steam client is corrupted somehow. That is why you are facing this problem while playing Counter-Strike: Global Offensive or similar games. So, you need to repair the corrupted files in the client program to fix this error. The steps are as follows. 

  • Go to your Steam client program, then click on “Steam” that is present in the top-left corner of the window and exit the program. 
  • Now click on the “Start” icon and type “cmd” to open the Command Prompt. Give the Administrator’s rights to command prompt and type “C:\Program Files (x86)\Steam\bin\SteamService.exe” /repair, then press Enter. 
  • Next, open the Steam client and start playing your game. Observe if the error is still there or not.

If the error persists, try the next solution. 

Keep Drivers Up-to-date

You may face this error when your graphics or Operating System drivers are not up-to-date. Hence, update all your drivers at regular intervals to avoid this kind of errors. If you are unable to update your drivers manually, use any third-party driver update application to obtain the drivers automatically.