Before downloading random files from the internet, try the official route. Open your . Right-click on Call of Duty: Modern Warfare 2 . Select Properties > Local Files . Click Verify Integrity of Game Files .
Interestingly, for some versions of the game, simply having a file with the correct name is enough to bypass the check. filesyscheck cfg modern warfare 2 top download
If you are using a modded client (like the fan-favorite IW4x), the file structure is slightly different, and a standard Steam file might not work. Before downloading random files from the internet, try
Corrupted sectors on an old HDD can "eat" small .cfg files. How to Fix the Filesyscheck.cfg Error Method 1: The Steam Way (Safest) for some versions of the game
How to Fix Filesyscheck.cfg Errors in Modern Warfare 2: The Ultimate Guide