Modern warfare add on unable to install.

Hello there @ThomasDressen, I hope everything is going well!

Thank you for reaching Microsoft Xbox Forum support. I want you not to worry about the situation because I am here to help you out! I believe your console might need either a network reset or just a system refresh.

I would like you to go through the following steps to clear the Mac address and then perform a quick power cycle on your console:

Settings > Network Settings > Advanced Settings > Alternate Mac Address > Clear it and the console should restart. It would definitely help if you could restart the internet router while the console is restarting.

After going through the troubleshooting steps mentioned, I invite you to perform a quick power cycle by turning off the console and then unplugging all the cables. After 2 to 3 minutes, re-plug them back again, then restart your console.

In case the issue still persists, the next step would be to perform a reset on the console. To do so you will need to follow the steps below to perform a reset on the Xbox :

Settings > System > Console Info > Reset This Xbox > Reset and Keep my Games and Apps.

Note =>The "Reset and Keep my Games and Apps" option will not cause losing your games, but please be aware that you need to be completely aware of the email address as well as the password of your account before going for it because it will require you to sign in to the account.

I wish you a lovely day, and I hope this helps you out! All the best!

Kind Regards

Stay safe, and happy gaming

This isn't working sir. You are just repeating the same message again and again

Thank you so much for that and do you have the Call of Duty: Warzone 2.0, installed? If yes, can you please check if you can install the packs for Call of Duty Modern Warfare II from there?

Go to "My games and apps" > Installed games > Highlight the game > Press the Menu button > Go to "manage games and add-ons" > Click the game icon.

Make sure that these packs are installed:

Call of Duty: Modern Warfare II - Content Pack 1

Call of Duty: Modern Warfare II - Content Pack 2

Call of Duty: Modern Warfare II - Content Pack 3

Call of Duty: Modern Warfare II - Content Pack 4

Call of Duty: Modern Warfare II - Content Pack 5

Call of Duty: Modern Warfare II - Content Pack 6

Hi, thought this might help.

Call of Duty: Modern Warfare

• Known Issue: Some players unable to access certain modes within the game.
  
• Workaround: Each mode for Call of Duty: Modern Warfare will require separate downloads in order to play those modes. For example, in order to play the Campaign, you would need to ensure you have the
  
  Campaign Pack 1 &
  Campaign Pack 2 add-ons installed. Be sure to go to My Games & Apps > Locate
  Call of Duty: Modern Warfare in either the Installed or
  Ready To Install section > Press the Menu button > Select
  Manage Game & Add-Ons to ensure you have all relevant content downloaded in order to play each mode.
  

I appreciate you letting me know. May I ask what pack are you looking for?

Go to "My games and apps" > Installed games > Highlight the game > Press the Menu button > Go to "manage games and add-ons" > Click the game icon.

Make sure that these packs are installed:

Modern Warfare - Campaign Pack 1

Modern Warfare - Campaign Pack 2

Modern Warfare - Multiplayer Pack

Modern Warfare - Special Ops Pack 1