I upgraded Windows, downloaded Xbox app for PC, purchased gamepass, still low performance...

it ur computer . The PC you are using might be outdated that why it low performance. Maybe upgrade your graphic card and if you are looking for a cheap and reasonable price one then i suggest either RTX 570 or Nivida 1660. And if that not the case then
it might be your cpu is weak so i would suggest Ryzen 5 3600 since it cheap and it more value for your money then Intel cheap ones. And last one is probably your storage is full or almost full to make the computer slow so get rid of the stuff you dont need
in the computer.

Hello,

If there is still issues head over to this website on some tips to improve performance on Windows 10

https://support.microsoft.com/en-us/help/4002019/windows-10-improve-pc-performance

Forza Horizon 4 recommends

• OS: Windows 10 version 15063.0 or higher
• DirectX: DirectX 12 API
• Memory: 12GB
• VRAM: 4GB
• Processor: Intel i7-3820 @ 3.6Ghz
• Graphics: Nvidia GTX 970 or NVidia GTX 1060 3GB or AMD R9 290x or AMD RX 470

Disney Recommends...

Windows

• Microsoft® Windows® 7 / XP® SP3
• 3.0 GHz Intel® Pentium® 4 class or AMD Athlon™ 64 3500+ or equivalent processor
• 2 GB RAM
• 4.0 GB free hard drive space
• 256 MB 3D video card supporting Shaders 4.0 (NVIDIA® GeForce 8400 or higher, ATI Radeon™ 2900 or higher)
  • NOTE: Onboard (built-in) integrated chipsets are not supported (e.g., Intel® on-board 8xx/9xx series chipsets, SiS and S3 series, ATI® Mobility Radeon® 7500 & X1300)
• 16-bit DirectX® 9.0c-compatible sound card
• 8x DVD-ROM drive
• DirectX 9.0c (included)
  
  Microsoft® Xbox 360 Controller (optional)

Hi,

Sound like an issue with your graphics card or cpu...

You need at least 4Gb of graphic ram to get a correct game and about cpu I5 6th gen or more recent one...

If you have that kind of devices, update your drivers.

Regards

you will need gamepass ultimate or gamepass pc for xcloud.

nobody knows if and when you may be able to run UWP apps on console, still a rumour at most.

you need a series x to run the upgraded versions so no.

no news on project latte but that is for the windows store on PC only.

No, They are not. I had GamePass PC earlier and everything used to work properly but then one day I got notification that there is an offer on GamePass Ultimate so I upgraded but since the day GamePass PC subscription ended and GamePass Ultimate subscription started, I can only launch games that are on EA Play and that too from EA Desktop App only.

Now, because the GamePass Ultimate was a 3 month subscription, so I can't even go back to GamePass PC until it's over.

Any game that launches from Xbox app for Windows fails to launch and tried repairing and resetting the Xbox and Microsoft Apps, sign-out and then again sign-in on both the apps but still same thing.

For Example, Forza Horizon 4 used to work earlier but now it does not.