Sometimes Xbox Live can interfere with the from-disc installation, and can even slow down the entire process. To speed up the root installation and avoid the risk of any delays, disconnect from Xbox Live, install the game and then reconnect to Xbox Live. Here's how you do it:
- Disconnect your Xbox One console from Xbox Live by either unplugging your ethernet cable from the back of the console or select "Disconnect Wireless" from the Network sub-menu in the console's Settings section.
- Power cycle your Xbox One console by holding down the Xbox button on the front of the console for ten seconds.
- Restart your Xbox One console and let the game install.
- Reconnect to Xbox Live. Be aware that you may be prompted to install an update for the game after you reconnect to Xbox Live.
If your on-disc installations are running smoothly, but you're having problems downloading or installing a game or app directly from Xbox Live, first off make sure that you are connected to the internet, to the service and signed in with the profile that originally purchased the content. To do this go to the console's Settings menu, select Network, and then under Current network status, you'll be able to see whether you're connected to Xbox Live and the strength of your local connection.
Then, make sure that you have enough space on your hard drive to install the content. If everything is a-ok and the download still isn't finishing up, you may have to do a little further digging. I've recently had apps get stuck on 100% download and still fail to install. If this happens, the trick seems to be to uninstall the app entirely, search for it again from the online Store, and starting the download again from scratch.
If you're still stalling, go to your notifications at the left of your home screen (or simply say "Xbox, go to notifications" to go straight there). Double-check to see if there are any notifications about low or unavailable hard drive space - the console should alert you when you're running low. If there is one there, you'll have to delete something to free up space. To do that, go to My Games and Apps, select the ones you want to delete, press the menu button whilst hovering over its icon and select uninstall. Whilst choosing items to delete, bear in mind that games will take up way more space than apps.