Downloading over watch breaks Xbox?

Reset the console to factory defaults, you won't lose anything but you will need to log in with your account again. Email and password are required.

Follow this path and select reset keeping games and app.

In 5 to 10 minutes you will finish reconfiguring your console

To reset the console>

Settings> System> Console Info> Reset Console

***Do not reset your console without having your account email and password.***

If the problem persists, I'm afraid the disc is defective. I recommend contacting Blizzard-Activision to check their disc swap policy.

I'm Samy an independent advisor. Welcome to the Xbox community. How are you?

Remove the disc from the console, do these 2 steps below, and try again, please.

Step 1: Clear the storage cache on your console.

Press the Menu key on your controller.

Click Settings, devices&streaming and then go Blu-Ray.

Select Persistent Storage.

Click Clear Persistent Storage 3 times

Step 2: Power cycle your console.

Press and hold the console's power button until the console turns off, remove the power and HDMI cable for a few minutes, plug everything back in, turn the console on.

If you have an external hard drive connected to your console, please remove it as well and try installing the game to the console's internal memory.

Yup, nows the time to download it and play them. I'll play them over Christmas break.

If you used your cousins account to purchase it then I'm afraid he owns the game. The only way for you to play it would be for him to sign in on your console and set it as his home console then you would be able to play it but the minute he goes home and
logs back into his Xbox you would lose the ability to play the game until he logs in on your console again. The only way for you to have a copy is to buy it logged into your own profile.

Did you use your cousin's account to make the purchase?

Is your cousin a member of the Preview Program?