Error: Call Of Duty Modern Warfare 3 Windows 8 Not Supported [FIXED]

Are you also facing the "Windows 8 Not Supported" error in Call of Duty: MW3? Worry not because I have got the solution for you!

cod mw3 cover image

Has your Call of Duty Modern Warfare 3  failed to start due to an error saying that Windows 8 was not supported? I managed to find some fixes that can help you clear the error and play the game without any problems. Let’s dive right into them!

Key Takeaways

  • If you have Windows 10/11 and getting the error “Your Operating System Windows 8 is not Supported,” then it is most likely that the problem is with your compatibility mode.
  • However, if that was not the case, your game files may have been corrupted while downloading Call of Duty Modern Warfare 3. 
  • This is a common error in the latest Call of Duty titles and has a similar solution.

After you download Call of Duty MW3 from Steam or launcher, you will most likely get the error after you launch the game for the first time.

Change Compatibility Mode Settings

If you have Windows 10 or 11 installed and are still receiving the error stating, “Your Operating System, Windows 8 is not supported,” the issue is with the compatibility mode settings. Here is what the error may look like and how you can get rid of it.

cod mw3 windows 8 error

  1. Force close your game launcher (Steam or from the menu bar.
  2. Open the file location of that launcher and open the properties.
  3. Head to the compatibility section and look for a box that says “Run this program in compatibility mode.”
  4. I recommend you uncheck that box, as it is using the settings of previous windows that might not support Call of Duty MW3.
  5. Try launching the game. If this does not work, repeat the above step for the compatibility mode settings of the MW3 application.exe file inside the game files folder.
cod mw3 error solution
Uncheck this box to solve the problem (captured by us)

Verify Integrity Of Game Files

In a scenario like this, I always prefer to verify game files to rule out the possibility of corrupt files. This can happen during the download phase of MW3, and reinstalling the game is tedious work. Therefore, I would advise you to avoid reinstalling.

According to my experience, this error is shared by other Call of Duty titles as well, such as last year’s Modern Warfare 2. A forum on Reddit has reported this error, and the users have stayed in confusion for a while.

Note that there are other solutions you can try, but they are generic and won’t be very effective. The main crux of this error is the alternation of compatibility mode settings.

However, if you wish to try other methods, I will list them for your ease:

Other FixesDescription
Update WindowsIf you have windows 10/11 and it is not updated to the latest version, your system might consider it outdated and not run the game. Head up to the windows settings and initialize the update.
Update Graphic DriversNVIDIA and AMD release frequent updates that support the textures of new titles. If you do not update your drivers to the latest version, COD MW3 might not support it and fail to run the game.

Personal Thoughts On The MW3 Error

In my opinion, errors like these do not cause much harm. However, most of the time, you are unaware of where to look, which can waste a lot of time. All the new games released in 2023 are not supporting older Windows, such as Windows 8. Hence, I strictly recommend you check the compatibility mode settings of every AAA title that comes out.

For more Call of Duty: MW3 content, check out: 

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