Steam will scan your folder, detect the missing data, and download a clean copy automatically. Open the Battle.net desktop app. Navigate to the Modern Warfare 2 tab. Click the Gear icon next to the Play button.

: Click the Gear icon next to the Play button and select Scan and Repair .

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Restart the console and perform a fresh from your official digital library or clean physical disc.

If downloading via a browser, clear your browser cache, disable temporary download managers, and redownload the game installer package from scratch to ensure no files are dropped.

Windows Defender or third-party antivirus software often flags large compressed .bin files as "false positives" and silently quarantines or deletes them.

What is the that pops up on your screen?