filesyscheck.cfg is a configuration file used by Modern Warfare 2 to verify the integrity of game files. It's a text file that contains a list of files and their corresponding hashes, which are used to check for any modifications or corruption.
Which platform launcher are you using (, Battle.net , or a custom client like Plutonium)? filesyscheck cfg modern warfare 2 top download
If the game engine detects that filesyscheck.cfg has been altered by a third-party application, deleted by an overaggressive antivirus, or corrupted during an update, it triggers a fatal error. Why You Should Avoid "Top Download" Mirror Sites filesyscheck
Delete the modified filesyscheck.cfg . Restore your backup. The "top download" might be for a different patch version (1.0 vs 1.3.3 vs 1.4.2). Ensure your game is updated to the latest Steam/Patch version. If the game engine detects that filesyscheck
For legitimate copies of the game (especially on Steam or Battle.net), you should never need to download fileSysCheck.cfg from a third-party website.
Click on the icon in your games list.
Add your entire Modern Warfare 2 installation folder to your antivirus exclusion list to prevent future launch crashes. Conclusion