It was a dark day for John, a hardcore Call of Duty fan. He had just installed Call of Duty: World at War on his computer, eager to experience the thrill of World War II combat with his friends. As he launched the game, he was greeted by an error message that made his heart sink:
Right-click CoDWaW.exe, select Properties, go to the Compatibility tab, and check Run this program as an administrator. Manual File Check:
The most common cause is a shortcut that adds a /bin subfolder to the loading path when the actual files are located in the main directory.
Navigate to your game's installation folder and find the executable (e.g., CoDWaW.exe).
To understand the error, one must understand the role of the .cfg file format within the Quake engine derivative used by Treyarch. Configuration files (.cfg) store variables and script executions.
.iwd (Internal Wave Data) archive can cause a checksum failure during the initialization phase.In the end, the error endures because the game endures. And as long as someone reinstalls World at War to play Nacht der Untoten one more time, filesyscheck.cfg will be there—waiting to be deleted, recalculated, or cursed.
Some antivirus programs (Avast, McAfee, even Windows Defender) quarantine filesyscheck.cfg as a false positive.
Navigate to Installed Files and click Verify integrity of game files.