When you use the "Verify Integrity of Game Files" feature, Steam compares the files installed on your computer against the master files on the Steam servers. It checks for missing files, corrupted data, or incorrect file sizes.
In most cases, Steam handles the fix automatically. When you see the message, close the properties window and let Steam download the replacement file. However, if you see this message repeatedly—every time you verify the files—you may need to take manual steps.
In simple terms, Steam compared the files on your hard drive to the "master version" on its servers and found a discrepancy. 1 file failed to validate and will be reacquired
If all else fails, the "1 file" might be a ghost in the machine. Go to your Steam Library. Right-click the game > > Browse local files . Delete everything in that folder manually .
Type chkdsk c: /f (replace c: with the drive letter where your game is installed). Restart your computer to let Windows repair the disk. The Nuclear Option: Delete the Local Content When you use the "Verify Integrity of Game
When you see the notification it indicates that a game client (most commonly Steam) has performed a file integrity check and discovered a discrepancy.
If it says 1 file failed,
Go back to Steam, right-click the game, and select .
Here's some content related to this error: When you see the message, close the properties
If Steam doesn't have "Write" permissions for your hard drive, it can identify a broken file but lack the authority to delete and replace it.
Launch the game. If it works, the "failed file" was just a configuration script, and the system fixed itself. Step 2: Clear the Steam Download Cache