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

CS: GO has recently experienced a surge in popularity, with its player base growing consistently day by day. Since the game turned free-to-play, its appeal has soared. Lately, numerous players have been encountering a prevalent issue that causes frustration. Upon starting the game, they receive an error message stating, "VAC was unable to verify your session". Some gamers attributed this error to a VAC ban, whereas others suspected that the problem lay hidden within the backend systems.

VAC, short for Valve Anti-Cheat, is the integrated system in the game designed to detect and penalize hackers and cheaters. When you encounter a "verify game session error," it typically indicates that some files have become corrupted, which hinders VAC's ability to verify the game's integrity. If you're facing this issue and unsure how to fix it, this article will guide you through the process.

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"VAC Was Unable to Verify Your Game Session" Error

To fix this issue, you must first understand how VAC operates.

This software collaborates with Steam to identify and apprehend players who attempt to join a game session while utilizing hacks or cheating software. It monitors for unauthorized programs or scripts operating alongside the game and also detects any irregular modifications to the game files. Upon detecting unfair play, the software promptly bans the user.

Consequently, the error message "VAC was unable to verify your game session" is displayed on the screen. This signifies that the Valve Anti-Cheat (VAC) system failed to authenticate your gaming session. Typically, this occurs when a third-party program or script has attempted to modify the game's execution or tampered with the game files, resulting in issues during the verification process of your game.

Conduct Some Initial Checks

Carry out any remaining preliminary checks that you need to.

• Exit your game session, restart it, and attempt matchmaking again.
• Relaunch the Steam client.
• Log out of Steam, then log back in.
• Restart your Windows computer.
• Temporarily disable Windows Defender or any other antivirus software, or specifically allow the Steam client and its directory folders.
• If you were connected to a Virtual Private Network (VPN), disconnect from it.

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

Solution 1: Restart Your Computer

Certain applications and processes, like disk indexing, might access your game files, causing VAC to be unable to verify them. This can be resolved by restarting your computer. Please follow these steps: 1. Save any open work and close all programs. 2. Restart your computer. 3. Once it's back on, launch the game again, and the issue should be resolved.

< strong > Step 1. < / strong > Close all applications and windows.

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

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

Step 4. After restarting your game, check if the error has been fixed.

Solution 2: Run the Game as an Administrator

Running the game as an administrator ensures that it has the necessary permissions to prevent crashes. Here's how to do it:

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

Step 2. Choose Properties.

Step 3. Navigate to the Compatibility tab.

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

Step 5. Click "OK" to save the changes.

Fix 3: Verify the Integrity of Game Files and Restart Your PC

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

Step 1. Once the properties window is open, navigate to "Local Files" and click on the "Verify Integrity of Game Files" button.

Step 2. In CS: GO's Local Files tab, there is a button labeled "Verify the Integrity of Game Files."

Step 3. Wait for this process to complete before restarting your computer.

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

Hopefully, these solutions have resolved your issues. If you found the provided solutions helpful, please share this guide to assist more people around you!

Fix 4: Repair the Steam Client

Another reason for this error might be that your Steam client is corrupted or contains malicious files. Here's how to address it:

Step 1. Click the Start button on your screen.

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

Step 3. When the User Account Control prompt appears, select 'Yes.'

Step 4. Copy and paste the following line, then press Enter: "C:\Program Files (x86)\Steam\bin\SteamService.exe" /repair.

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

Step 6. After closing the Command Prompt, restart your computer. Check if the 'VAC was unable to verify the game session' error has been fixed.

Fix 5: Completely Reinstall CS: GO

If none of these solutions work, your issue is probably not one that can be resolved by changing a setting or restarting your computer. Although we suggest searching online to see if any other solutions might apply, reinstalling CS: GO will be a time-efficient solution. Reinstalling the game will swiftly address the problem, sparing you the effort of trying various fixes that are unlikely to be effective.

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

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

Then you'll have to reinstall CS: GO.

Final Words

Through this article, we aim to help you resolve the CS: GO "VAC was unable to verify your game session" error. By compiling all the solutions in one place, we've made it convenient for you to fix the CS: GO issue within just a few minutes.