5 Ways to Fix VAC Was Unable to Verify the Game Session

The Valve Anti-Cheat System, or VAC for short, was built with the goal of detecting altered installation documents or setup records in popular games like Counter-Strike.

Global Offensive in order to prevent malicious users from abusing workarounds to get an unfair advantage while playing. To put it another way.

VAC is a component of a computer gaming platform that, if it detects any faults while playing that could allow a player to get an unfair advantage, will ban the player at a later or earlier period.


Even if a few users aren’t changing the game or design documents, it’s possible that VAC will make a false positive mistake and display the message “VAC was unable to validate the game session” when you try to start any web-based game session or authority setup.

The player is subsequently barred from connecting to any VAC-certified game servers, and their account is subjected to additional restrictions.

Is it Possible to Know if a Game is VAC-Banned?

If not, give this a shot. Launch Steam > Games to see which games your VAC restriction affects. Select “Click here for details” under VAC Status in Steam’s Settings > Account Tab.

The games from which you are VAC-banned are listed below. If you’re using any tweaks or upgrades to cheat, now is the best time to stop because you won’t be able to perform any matchmaking.

You might get blocked at some point and won’t be able to recover your progress or any information. However, if you aren’t using any of these, you might be able to figure out how to fix the VAC was unable to verify the gaming session error.

VAC Was Unable to Verify the Game Session: 5 Solutions

The methods listed below can help you avoid the VAC was unable to verify the game session issue. Let’s have a look at them all.

Method 1: Log out of Steam and Then Log Back in

If the working framework or the document layout of the PC has changed some of the design records, the VAC may not be able to confirm them.

As a result, the VAC will toss the gaming session error since it was unable to verify it. You can try to resolve this issue by just logging out of your steam account and logging back in using similar credentials (id and password).

Step 1 – To run the Steam application, first click on the Steam icon on the taskbar, Desktop, or Start menu.

Step 2 – On the title bar, select your profile name as it starts up. In the drop-down option, select Log Out of My Account and follow the on-screen instructions.

Step 3 – Log in with the same credentials as before.

Method 2: Reboot Your Computer

When other applications or processes, such as antivirus or disc indexing service, access files that need to be validated by the VAC.

The operating system may refuse to let the VAC service to execute its function, resulting in the VAC was unable to verify the gaming session error. Simply reboot the machine to see if it helps –

Step 1 – Go to the leftmost bottom corner of the screen and click the Windows icon. Choose the Start menu option.

Step 2 – Press and hold the Power button while selecting Reboot.

Step 3 – Open your game after completing the Reboot feature to see if you can start a game session right away.

Method 3: Verify the Game Files’ Integrity

Follow these procedures to manually check the integrity of the game files installed to ensure that they are exactly as reported by the distributors and that no changes have been done to the files.

Step 1 – Click the Steam icon in the Start menu to launch it. Then go to the Library tab to see what games are installed.

Step 2 – Right-click on the game in which you are experiencing the error and select properties.

Step 3 – In the local tab, select the Verify integrity of the game files option.

Depending on the size of the game and the type of storage used, as well as background activity, this step may take some time. Run the game again when the check is completed to see if the problem has been resolved.

Method 4: Repair the Steam Client

The user may have corrupted or harmed records, resulting in the VAC being unable to verify the gaming session error. The steps listed below can be used to correct this.

Step 1 – Press the Windows + R key combination. The word ‘Run’ will display in a dialogue box. Open the command prompt by typing cmd.

Step 2 – In the command prompt, type “C:Program Files (x86)SteambinSteamService.exe /repair” without the quotes and hit enter.

Step 3 – Leave the fix alone and restart the computer after it’s finished. Attempt to open the Steam application first after the restart; it may reconfigure itself or download a few records for update or configuration.

Open the game and see if the VAC was unable to verify the game session error has been repaired.

Method 5: Antivirus Scan Exclude Game Directory

While it is generally not recommended, you may need to restrict some files or websites from screening in order to speed up your scans or avoid false positives.

As a result, the antivirus may attempt to scan the game directory in the background, preventing the VAC service from verifying the game files.

To avoid this, simply whitelist the game to prevent it from being scanned automatically. When the game directory is added to the excluded folders list, it is automatically excluded from any scans and shields.

By going to the settings of your anti-virus software application programme, you may add the game directory to the list. Simply follow these instructions to do so –

Step 1 – Launch the anti-virus programme and go to Menu > Settings.

Step 2 – Go to the General menu, then to Exceptions. After that, select Add Exception from the drop-down menu.

Step 3 – Click Add Exception after typing the file path or URL of the file or folder you wish to add to the exceptions list.

The exceptions list now includes your chosen game directory.


It’s frustrating when you make little mistakes while playing a game. It’s quite improbable that such blunders will go unnoticed. When we ignore a multitude of minor concerns, they might balloon into major problems.

In the end, any of the aforementioned methods can be used to remedy the VAC was unable to validate game session issue.

You can correct such an error by following the procedures, which have been attempted to be put in the simplest manner possible under each technique.

I hope that this post has assisted you in resolving the mistake and that you are now able to play online session games again.

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