How to fix CS:GO’s “VAC unable to verify” error
Don’t let pesky error messages get in the way of playing.
You load up a game of CS:GO for the first times in weeks and boom, you see a message that that reads: “VAC unable to verify.” What does it mean and how do you fit?
Don’t panic, unless you’ve been playing around with wallhacks and aimbots in your spare time, there’s nothing to worry about.
When Valve patches CS:GO, this error message has been known to make an appearance. The reasons for it are currently unknown, but it’s thankfully easy to fix.
Before all try to reboot your PC and your whole network (modem or main operator modem).
All you have to do is close CS:GO and head into your Steam library. From there, right-click on Counter-Strike: Global Offensive and select properties at the bottom of the drop-down menu.
Next, choose Local Files (the third tab to the right) and select verify integrity of game files. After a minute or two of loading, this should validate your files and kickstart your game. If all goes according to plan, “VAC unable to verify” should now be gone for good.
But before you load up CS:GO again, make sure to restart Steam. If this doesn’t work and you’re still scratching your head and looking for answers, reinstalling CS:GO is probably your next best option. It’s tedious and it might take a while, but if validating your files didn’t work, reinstalling should.
To uninstall CS:GO, head to the library, and right-click on the CS:GO icon again. This time though, choose Manage, uninstall, and finally install again.