Manually delete any leftover folders for that game in your steamapps\common directory. Reinstall the game.
If the error affects multiple games, your core Steam client DLLs may be corrupted. Manually delete any leftover folders for that game
If a standard retail game is throwing this error, a critical update may have been interrupted, leading to file corruption. Open the . Go to your Library and right-click the problematic game. Select Properties from the context menu. Click on the Installed Files (or Local Files ) tab. Manually delete any leftover folders for that game
