Maybe you shouldn’t pack your bags and suitcases for a VACation yet. This is a solvable issue and there are many different solutions that you can apply to fix your Counter-Strike: Global Offensive game so that you can do away with the “VAC was unable to verify your game session” error. Go through the checklist below to resolve this error quickly. It’s mostly not your fault. VAC (Valve Anti-Cheat) tries its best to remove cheaters from the game, and in this guide, we’ll help it communicate better with your PC so that you can play without obstructions.
What to Do to Fix “VAC Was Unable to Verify Your Game Session” Error in Counter-Strike: Global Offensive
Below is a list of known methods that fix the “VAC was unable to verify your game session” error.
0. Disable / Close / Temporarily disable your third-party Antivirus.
We are putting zero here because that’s the fundamental part of this troubleshooting. It is widely known that some antivirus programs and their permissions in the system can cause a lot of trouble. If disabling the software resolves the issue, consider contacting the support of the software manufacturer so that they can provide options for you to keep using the software while still allowing your Steam Client to function properly. Make sure you keep your antivirus closed while doing this troubleshooting.
1. Verify Integrity of Game Files
From your Steam Library, Right-click on Counter-Strike: Global Offensive in the installed games list and click on Properties. From there, go to Local Files, and Verify Integrity of Game Files. This is the fix that commonly works. This function checks if your game files are legitimate and clean. In case there is a fault with a file, or a file is missing, Steam will replace it for you automatically so sit back and relax while this check is being done.
If this didn’t fix the issue, proceed to the next fix below.
2. Close and Re-open your Steam Client
Maybe a good ol’ restart fixes it. It never hurt anyone. In your taskbar, find the Steam icon, right-click on it, and hit Exit (option at the bottom). Run Steam again and try playing CS:GO again.
Related: Best Cases to Open in CS:GO (2022)
3. Log Out from Steam and Log Back in
From the top-right of Steam Client, click the down arrow next to your name, and then “Log out of Account”. You will get to a login prompt, where you can log back in.
4. Run Steam and CS:GO as Administrator
Close Steam completely (from the System Tray as usual) and then right click on the Steam shortcut on your desktop and click “Run as Administrator”. Next, you need to run Counter-Strike: Global Offensive as Administrator:
- Right click the game in your Steam Library.
- Move your mouse to Manage, and then click on the “Browse Local Files” option.
- Locate csgo.exe, right click on it and left click on Properties.
- Go to the Compatibility tab.
- Check the box which reads: “Run this program as an administrator”
- Click OK.
5. Perform a Repair of your Steam Client
We’re sailing in the more complex troubleshooting waters now. Close your Steam client (you need to exit Steam from the System Tray). After that, hold the Windows Key, press R and type in “cmd” in the prompt that comes out.
Type in the following, with the quotation marks:
“C:\Program Files (x86)\Steam\bin\SteamService.exe” /repair
As with the verification of game files, this is a process that you just start and let it finish by itself. When it’s done, try to boot up Steam again, and then try out CS:GO.
6. Reinstall Counter-Strike: Global Offensive
If this didn’t help either, try to conduct a fresh installation of CS:GO. From your Steam Library, right click CS:GO and then go to the Manage —> Uninstall.
When this is done, ask Steam to install it again by hitting the big blue “Install” button.