Minimized Screen

Hi there kioairi welcome to the community forum! Christopher here, an Xbox fan just like you and has been on Xbox for years already. I would really love to make your day by helping you out! Have you tried scaling the display to 100%? You can do it like this:

Open the Settings app and go to System > Display.

Windows 10 not using full screen

Find the Change the size of text, apps, and other items and set it to 100%.

It has been reported that many games won’t run properly unless the display scaling is set to 100%, so use the above steps to set display scaling to 100% in Windows 10.

You might have to sign out of your account and sign back in order to apply the changes, so be sure to do that. Up next, check if your games are working again.

Even more, there’s a game booster that will get rid of low FPS, freezes, lags, and other issues while playing. If you like the idea of a better gaming experience, don’t hesitate to give it a try as well.

Ususally the party app docks itself to the right of the screen. You need to have it minimized i.e. "undocked" before starting the game.

Where do you have the option to minimize the Streaming screen, where do you have this option, can you help me?

I have the exact same issue. Windows 8.1 and I open SmartGlass (release and beta versions), and get a green window. Then it kind of crashes by minimizing the window but not actually launching, you can click the app to make the green screen pop back up for
a second only to minimize again but not actually load.

Quantum - Yes, very similar. I haven't tried clicking around to get the Signing On screen to minimize, will try that today. Mine will sit there with a Black Screen, the "Signing On" circle spinning for a minimum of 45 secs after the primary Xbox loading
screen. Then it jumps to the Home.