VAC was unable to verify your game session

VAC was unable to verify your game session
VAC was unable to verify your game session

Looking to fix VAC was unable to verify your game session?

Online gaming has blown up a great deal in recent years: the experience and sense of competition that they provide cannot ever be matched by offline, single-player games.

Also, you can play with your friends and feel like you are both engaging in a common activity, even though you might be at two completely different places. Indeed, online multiplayer gaming has taken the world by a storm, and for a reason. 

Among online games, Steam holds the dominant position now, as its games Counter-Strike: Global Offensive and Defense Of The Ancients 2 are the most wildly successful and popular online games that are out there.

CS: GO in particular has struck a chord with the online gaming community: it is so popular now that tournaments with prize pools of millions of dollars are organized around it. In this article we will be telling you how to fix VAC was unable to verify your game session.

VAC was unable to verify your game session

As a gamer, obviously you would love to play the online games that are so hyped right now. Almost every gamer out there has tried playing CS: GO at least once; in fact, Steam has recently made CS: GO completely free to play: you can easily download it from the Steam store without having to pay a single cent for it! This is a major reason for the recent skyrocketing of the already immensely popular game.

In fact, the entire online gaming saga started with the classic Counter-Strike 1.6 – a truly legendary and much-loved game, whose servers were sadly shut down in recent times. Every one of your friends now probably have the game on their PC. So you thought, why don’t I try it out as well?

So you install the game on your PC, and with great expectations start the game, and hit the start button to start searching for a match where you can enter, only to find a single message greeting you:

“Matchmaking failed: VAC was unable to verify your gaming session.”

How anti-climatic, is it not?

This is a widespread problem that is faced by CS: GO players worldwide; you are certainly not alone in this regard. This is a very disruptive error as it completely blocks you off from playing multiplayer matches as it does not allow you to go through the matchmaking process. This is certainly very off-putting as the multiplayer mode is pretty much the only reason that one would play CS: GO; it does not have any single player mode whatsoever, unless you want to practice with AI bots. But worry not: for this problem can be fixed via a few simple measures.

Methods that you can try to fix VAC was unable to verify your game session

The measures listed below have proved to be useful to players who have been dealing with the same problem as has been mentioned above in fixing it. Of course, not any or all of the methods may work in your case; you would have to simply use the process of elimination to arrive at the correct solution and fix the issue.

  • Restart Steam.
  • Ensure that your game files are all present.
  • Repair Steam.
  • Update network interface device drivers.

1) Restarting Steam: Fix VAC was unable to verify your game session

Sometimes, errors such as these may creep up before you due to excessive cache generation or corruptions in the Steam client. In this case, a simple restart of the Steam client should fix the problem for you.

  1. Fire up Steam’s interface.
  2. Click on the drop-down menu on the upper left corner, the one that says “Steam” on it.
  3. Click Exit.
  4. Reopen the Steam client.
  5. Click on the drop-down menu on the upper left corner, the one that says “Steam” on it.
  6. Click on the Go Offline option
  7. On the dialogue box that you are greeted by, click on the ‘Restart in offline mode’
  8. Once you are done with that, click on the Steam drop-down menu again.
  9. Click on the Go Online option.
  10. Click on the ‘Restart and Go Online’ option.
  11. Launch CS: GO.

Check if this fixes the error for you, by attempting a matchmaking session again. If no error message is displayed, then congratulations! If the error still persists, move on to the next fixes.

2) Verifying your game files

Sometimes the error may also be caused due to certain files belonging to the game being missing or corrupted. If the above method did not work for you, we recommend that you use the Steam client to check for the integrity of your game files. To do so, please follow the instructions given below carefully.

  1. Start up the Steam interface for your device.
  2. Click on ‘LIBRARY’
  3. Search for Counter-Strike Global Offensive in your game Library. Once you find it, right-click on it.
  4. From the drop-down menu, click on Properties.
  5. Click on the tab designated as “Local Files”.
  6. Click on the VERIFY INTEGRITY OF GAME FILES option.
  7. Click on close once the process of validation completes.
  8. Launch CS: GO and see if the issue has been resolved.

3) Repairing the Steam client: VAC was unable to verify your game session

As the multiplayer functionality depends a lot on Steam and its verification processes, if the Steam client itself is corrupted it may cause errors in CS: GO. If this is the case, one must try and repair their Steam client, the steps for which have been discussed below.

  1. First of all, we must exit Steam. To do so, we click the Steam menu and then click ‘Exit’ from the menu that drops down. 
  2. Open the Command Prompt with administrative privileges by typing cmd in the Start menu and right-clicking it and clicking on ‘Run as administrator’.
  3. Execute the following command in the Command Prompt: “<location of Steam directory>\bin\SteamService.exe” /repair

For example if your Steam is located in the default directory then the command would read: “C:\Program Files (x86)\Steam\bin\SteamService.exe” /repair

4)   Proceed to reopen your Steam client and launching the game.

Once you are done with these steps, your game should start functioning fine in case the problem had arisen due to issues within your Steam client. Sometimes if even that does not work a complete re-installation of Steam may be required.

These were, therefore, the many ways by which you can fix the “VAC was unable to verify the Game Session” issue on CS: GO and finally start or resume playing fun multiplayer matches with friends and family, or maybe even just interesting strangers. Thank you for reading this article; we do hope that it proves to be of some use to you. Happy gaming!