We weren't able to Install the app (0xUnknownAppInstall)

Hi and thanks for reaching Microsoft Xbox gamer's community. My name is Josef.
I'm an Independent Advisor and a Microsoft Xbox user like you.

Hope you're doing great today despite this Itzzdev

Please tell me:
What are your hardware specs?
Are you using windows 10 or 11?
If you try installing a different app the same happens or is this happening only with Minecraft?
Are you using a virtual machine?

And please describe me briefly what else did you tried to fix this
In that way I can advise you different things or how to proceed

Thank you, may I know if you tried downloading and installing the Launcher marked as Windows 7/8 from this page - https://minecraft.net/download ?

If not, please try that.
If maybe the issue persist, let’s try to isolate the problem a bit more

A. Open task manager > select the startup tab > disable all the programs listed there temporarily
Restart the PC and try again

B. Do a clean boot in your PC and try again
https://support.microsoft.com/en-us/topic/how-t...

C. Create a new local administrator user in your PC and try from there
https://support.microsoft.com/en-us/windows/cre...

D. If maybe you have an antivirus, firewall, system optimizer or similar program. Please turn off all the protections temporarily and try again

Sorry for late reply.

I tried the solutions but they didn‘t fix the problem again.

But you’re able to sign in with your account flawlessl here, right?
https://account.microsoft.com/profile

If yes, this can be a bit odd, but try this:

A. Press Windows button and type Services

On Services App from the list of results, press right-click and run it as administrator

Scroll to the bottom and find the following services:

IP Helper
Xbox Live Auth Manager
Xbox Live Game Save
Xbox Live Networking Service
Gaming Services

And do this with each of the services listed above:

Right-click over the service and select Properties.
Find the Startup type section and make sure it’s set to Automatic (if not, change it to automatic)
If the service isn’t started, click Start to start the services

Restart your PC and try again

B. Open the Control Panel in Windows.
After opening the control panel, set the “View by” on the top-right corner to “Large icons“.
Click on the “Network and Sharing Center” option.
Here, click on the “Change adapter settings” link on the left panel.
Now, right-click on the active network adapter and select “Properties“.
Go to the “Networking” tab.
Here, uncheck the “Internet Protocol Version 6 (TCP/IPv6)” option.
Click on the “Ok” button to save changes.
Then close all the windows, restart your PC and try again

Hello,

I haven't tried any other things other than what I stated in my question except for Restarting my pc a few times and deleting .minecrft trying.

I am Using Windows 10.

My pc specs:
Device name DESKTOP-3DVGQ75

Processor AMD Ryzen 7 2700X Eight-Core Processor 3.70 GHz

Installed RAM 16.0 GB

System type 64-bit operating system, x64-based processor

Edition Windows 10 Home

Only happens for Minecraft.

No, I am not using a virtual machine.