My legit COD4's CD Key Code, is now saying invalid, upon re-install of COD4

Jan. 17,2025
my game was fine last night, everything worked perfect.
I had a problem with Windows 10 today, so, did a Fresh installation of Win10, then did a fresh install of COD Modern Warfare 4, and sure enough, the install keeps telling me, that my key code is Invalid!
I have no idea what the problem is, and I was also online playing the Multi-player version of cod4 last night.
All I know is, I have a valid CD, a proof of purchase/ receipt from LabelGames.com ( invoice # 15270 ) Date of purchase: Dec. 18, 2019, and I am unable to use it.
Please help.
Thanx in Advance

Looks like a new problem to me. Quick google found that people on GameTracker have just ran the install as admin and it fixed it.

This link here has other solutions also. Let me know if that helps.

thank you :slight_smile: I got it fixed! :slight_smile:

What ended up working?