Are you getting an “Your operating system Windows 8 is not supported” error in Modern Warfare 2?

Here’s the second part of the error message, “We recommend upgrading to Windows 10 version 1909 or newer”.

Followed by, “Would you like to visit Activision Support for more information”?

Clicking on “Yes” redirect you to the Activision support page for more details while clicking on “No” will close the message.

In this guide, you’ll learn how to fix “Your operating system Windows 8 is not supported” in Call of Duty: Modern Warfare 2 (MW2).

Why is my operating system not supported by MW2?

Your operating system is not supported in MW2 because it’s outdated.

Modern Warfare 2 requires Windows 10 and above to run.

If you have Windows 10 or 11 but you’re still getting the error message, it means that you’re running the game in compatability mode.

This will cause the game to crash when you launch it.

How to fix “Your operating system Windows 8 is not supported” in Modern Warfare 2

To fix “Your operating system Windows 8 is not supported” in Modern Warfare 2, you need to disable compatibility mode for Steam and MW2.

In addition, you need to ensure that you have the latest version of Windows.

If all else fails, you can contact Activision support here: https://support.activision.com/.

Fix 1: Turn off compatibility mode for Steam

Exit the Steam desktop app and MW2.
Right-click “Steam” and select “Properties”.
Select the “Compatibility” tab.
Uncheck “Run this program in compatibility mode for”.
Select “Apply” and select “OK”.
Launch Call of Duty: Modern Warfare 2.

Fix 2: Turn off compatibility mode for MW2

Exit the Steam desktop app and MW2.
Go to the installation path of MW2.
Right-click “cod.exe” and select “Properties”.
Select the “Compatibility” tab.
Uncheck “Run this program in compatibility mode for”.
Select “Apply” and select “OK”.
Launch Call of Duty: Modern Warfare 2.

Fix 3: Update Windows to the latest version

Search for “Check for updates” using Windows Search.
Select “Check for updates”.
Select “Download & install” if there’s an update.