In this instructable i wil teach you how to make a vbscript in notepad that will fix validation errors with steam games such as portal 2 and then give you the option th launch them.
It will also give you some idea about writing your own vbscript.
My Steam wants to validate TF2 at least every other day for some reason, which takes a good 5 to 10 minutes.
Both were free and both download updates incessantly, so I uninstalled them.
If something goes whacky with your game, this sometimes fixes it.
Steam support suggested it once and it got me out of a problem I had, so I try it again on occasion.
I've been aware of the validate steam cache files for a while.
If your Steam Game is stuck in a loop where it constantly updates and validates itself, and when you try to launch it returns an error referencing corrupted update files, the quickest solution is to do a full reinstall of your game.If a file cannot be verified, it is replaced by an online copy which often resolves the issues that you are experiencing.To verify individual games on Steam do the following: While that is useful if you only need to verify one game or maybe two games, it is not really a solution if you need to verify all games you have installed on your system.In case it helps I've noticed that any missing manifest files are not even being downloaded (or at least not stored in the depotcache directory) at the start of the verification process.Team Fortress 2 does verify, so I suspect that this is limited to games using ACF. After verifying TF2 it seems that I can verify other games OK, but it doesn't work again after restarting Steam.