If you need the original installer, here are the only safe sources. Ignore all third-party "clone" websites (we will name red flags later).
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The standalone Setup.exe is largely obsolete for digital users. If you have a physical copy, it works fine, but manually backup your installer files. Call Of Duty Modern Warfare Setup.exe File Download
Ensure your PC meets these specifications before starting the large download (approximately 175 GB to 246 GB depending on the version and updates): Activision Support Call of Duty: Modern Warfare III Installation and Setup If you need the original installer, here are
If you're eager to play Call of Duty: Modern Warfare, we recommend purchasing the game through the official channels and following the installation instructions provided. Not only will you ensure a safe and secure gaming experience, but you'll also support the developers and publishers who work hard to create high-quality games. If you have a physical copy, it works