New Xbox ui not working. Why????

No, what im asking is that why do i have the old ui instead of the new ui after i fully resetted my computer and why the new ui only appears on the xbox, xbox console companion and minecraft (from the in-game sign in button)

The new UI looks good. Although, i can not draw a parallel to the PS3 XMB. I wonder how Themes will work with this UI

Because in the new UI you scroll vertically, not horizontally. I love the new Windows 10 UI on Xbox 1. It's far too good to call it a Windows 8 UI. The new UI is way more faster, which proves UI/OS performance is based off 'how they make the software', NOT
solely on your ISP. Windows 7 was a big improvement to Windows Vista. The same could be said of Windows 8 and Windows 10 - Windows 8 was so bad, they had to make a Windows 8.1 lol. How was Windows 7 and Windows 10 an improvement? Because Microsoft 'listened'
to the feedback they got. That's why many people are happy and excited with Windows 10, and how Microsoft promotes the Windows 10 UI. Face it, the new UI is Windows 10 like.

I love it how they youthfully call it "my stuff" rather than "pins". "my stuff" sounds more fun for younger members on Xbox including myself, than 'PINS'.

I agree it's "such an improvement". You'll learn to adapt to it. Hey, I had to Update how rubbish that Windows 8 UI was like when I got Xbox 1 day 1. The UI didn't allow us to change the background. And it was so slow for a console with 8GB RAM and an AMD
Jaguar 8 core APU. Most of my friends and people I've met on Xbox Live found it hard to adapt to a Windows 8 UI on a console. It was inflexible. But when Microsoft released the new UI last week was it, suddenly Xbox 1's getting a lot of positive vibe about
it's new UI.

looking forward to these new updates. Hoping for a new UI design when the new xbox is released more tidy and unique UI would be nice to have.

I prefer the new UI. I've seen a bunch of people not like it and I don't really understand why.