10 Ways to Fix ‘VAC was Unable to Verify the Game Session’

Games like CS: GO (Counter Strike: Global Offensive) is very popular and is enjoyed by different players across the world. But many players have reported that when they try to queue for matchmaking, a message appears as “ VAC was unable to verify your game session” and the matchmaking fails.

This problem also occurs when players try to join the Stream community as well. Here in this article, we will try to find why this error occurs and also suggest few ways about how to resolve this problem successfully.

Why Does It Say VAC was Unable To Verify Your Game Session?

Valve Anti-Cheat System or VAC is a feature that detects any type of anomalies in the installation files. It is there in order to prevent the gamers from changing game files to attain any unfair disadvantages over other players.

But when VAC displays that it has failed to verify your game session and you yourself haven’t tampered the game files then there must something wrong with the configuration of your game files. And it ends up generating the false message “VAC was unable to verify your game session”.

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How To Fix VAC Was Unable To Verify The Game Session Error?

Many players tried uninstalling and then again reinstalling the game but the problem persists because when you reinstall the game again the same files get download again and hence the problem remains the same. So here we will provide few ways by which you can get rid of the message “VAC was unable to verify your game session”.

1. Restart the Stream Client

If you restart the Stream client it can fix any corruption which might be there in your game files and may have been causing the error. Here are the steps about how to do it:

Step 1: At first, click on the Stream tab in the left corner and then click Exit in the context menu.

Step 2: Then click again on the Stream Client.

Step 3: Then again click on the Stream tab on the left corner and then click “Go Offline”  from the context menu.

Step 4: After that click the “Restart In Offline Mode” option.

Step 5: Then again click on the Steam tab on the left corner of your screen and this type click  “Go Online” from the context menu.

Step 6: Finally click the “Restart and go online option”

Now, finally, try queuing for a match again to check if the same problem persists or not.

2. Logout of Stream and Log In Again

If the above method doesn’t solve your problem then you can try logging out of the stream and then again logging in. Sometimes your operating system is responsible for modifying your configuration files and thus causing the VAC error. If you log out of your stream account and then log in again then your files will be created again and this issue may be resolved permanently. Here are the steps about how to execute it –

Step 1: At first, open your stream app.

Step 2: Then click on the Profile name from the top of the window.

Step 3: Press the “Log out my Account” from the context menu.

Step 4: After the log-out procedure is complete, enter all the credentials and log in again. In case you have forgotten your password you can click on the “Reset Password” option.

Then open the game check if the problem is persisting or not. If it is still persisting then go to the next method.

3. Repair the Steam Client

Sometimes your stream client can contain corrupt files and thus can create the error. Here are the steps by which you can repair the Stream Client –

Step 1: At first, click on the Start option from the lower left corner.

Step 2: Then click on Command Prompt(Admin) from the Power User Menu.

Step 3: Then when the UAC prompt is presented, click on the “Yes” option.

Step 4: Then Enter the line: “C:\Program Files (x86)\Steam\bin\SteamService.exe” /repair

Step 5: The wait for some time and let the process complete.

Step 6: Finally close the Command Prompt and reboot your computer in order to check if the problem persists.

4. Exclude The Game Directories From The Antivirus Scans

If you have any antivirus program in your computer it automatically scans your game files and thus prevents VAC from verifying the game files and ASA result this error can occur.

In this case you can whitelist the Stream Directory and also select the option in your antivirus program which prevents the particular game’s files from being auto scanned. This method can resolve the VAC error.

5. Stop conflicting Background tasks/services

If you use VPN/proxy it can cause the “VAC was Unable to update your game session” error which you might be facing by making the VAC flag you. Here are the steps by which you can stop it:

Step 1: At first, Press the Window Key+ R to open the Run accessory.

Step 2: Then type “Services.msc” and press Enter to open the Service Management Window.

Step 3: Then try to locate any one of the following services –

  • VMnetDHCP
  • VMUSBArbService
  • VMware NAT Service
  • VMwareHostd
  • VMAuthdService
  • Hshld

Then right click on them and press Disable in the Context Menu.

Step 4: Now close the Service Management Window and then right-click on the Start Option which is there in the bottom left corner and then click Task Manager.

Step 5: Finally go to the Process and try to locate the followings:

  • hydra.exe
  • hsswd.exe
  • hsscp.exe
  • vmware.exe

Now click the End Task options after clicking on each one of them.

6. End the Stream service in Task Manager

There may occur problems with the Stream services working in the background and ending it may resolve the error. Here are steps by which you can end it –

Step 1: At first, in order to open the Power User Menu press Windows Key+ X.

Step 2: Then click on the Task Manager.

Step 3: After that go to the Process tab and then select Steam Services and press the End Task button.

Step 4: Now check if the issue has been resolved or not.

7. Verify DLL File

There are two DLL files on your computer one in the  Program Files Folder in Local Disk C and the other in the Stream Installation Directory. If these two files differ then VAC is not able to verify the game session. This error can be fixed by copying one of the DLL files and using it to replace the other. The steps to execute this are as follows –

Step 1: At first go to the Stream Installation Directory which is in the path C>Program Files (x86)> Steam > Bin.

Step 2: Then right-click on the “Streamsevice.dll” and copy it.

Step 3: Now again go to “C>Program Files (x86)>Common Files> Steam”  and paste the .dle file you copied in the previous step. But if it is shown that the file already exists then replace it by clicking the “Replace” option.

Step 4: Finally run the game again to see if the problem is occurring again or not.

8. Update your Drivers 

The error may also occur if you don’t have the required driver device on your computer. Updating your driver device can solve the error properly.

9. Update Windows

Updating your Windows can solve a lot of problems and it also fixes many issues and in that process, this error may also get resolved. Here are steps required to update your Windows –

Step 1: At first press the Windows  Key+ I in order to open the Settings App.

Step 2: Then Click on Update and Security which is there in the Settings App.

Step 3: Now click on the Windows Update option, which is there in the left pane.

Step 4: Finally click on the “Check for Updates” in the right pane. And after the Windows is updated reboot your computer.

10. Turn Off Steam Beta

Many users complained that they have started to encounter this error after switching to Steam Beta. So this error might get resolved if you turn the Steam Beta off. Here are steps to do it –

Step 1: At first open Steam and log in to your account over there.

Step 2: Then after clicking on the Steam Tab, select Settings which appears in the menu.

Step 3: The from the left pane, click on Account.

Step 4: After that from the right pane, click the “Change” button from the section of “Beta Participation”.

Step 5: Now click “NONE- Opt. Out of All Beta Programs”.

Step 6: Finally click OK in order to save the change. And then open the game to see whether the issue has been resolved.

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Here in this article, we have mentioned the possible reasons for this error and also discussed few ways by which this issue can be resolved. We hope that this article helps you to get rid of the error and the message “VAC was Unable to verify your game resources” stops popping up and your game experience becomes smooth.

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