It will not let me sign in on the xbox app on PC.

this step is for files that cannot be replaced, were you able to replace the file with existo ? if yes, you don't need to do this step.

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 Dylan

This can be a bit odd, but please try creating a new local administrator user in your PC and try using the Xbox app from there:
https://support.microsoft.com/en-us/windows/cre...

If maybe that doesn’t work, may I know if you already tried these solutions?

1. Run the SFC tool to find and repair possible system corruptions

https://answers.microsoft.com/en-us/windows/for...

2. Perform an in-place upgrade for your system (is not the same as the regular update via windows settings, and don't worry your content will remain)

https://answers.microsoft.com/en-us/windows/for...

Hi

I have done this to the best of my knowledge;

So ran the test and scan and i got this message: Windows Resource Protection found corrupt files and successfully repaired them. Details are included in the CBS.Log %WinDir%\Logs\CBS\CBS.log.

I then followed the advice for this to my limited knowledge of computer systems etc. I think I found the issue being /mscommc.dll saying it does not match.

I followed the steps under : How to view details of the System File Checker process and i copied the file however I'm stuck to what I do after copied the file, which is detailed in point 3. Something about Destination?

Hi there

Thanks for the quick reply. I have unfortunately tried the other user solution and it did not work...

I also tried both of the solutions you offered, but neither of them fixed the issue...

UPDATE:

So, I tried even more solutions online + all the ones listed here and nothing worked. So I left the Xbox PC app installed on my PC and forgot about it for a few weeks...

I come back to it randomly today with no hope and no faith, and there it is. I'm signed in. All my games appear. Happy days.

I have no idea what happened to fix this, but fixed it is. Sorry I can't offer any guidance to people still struggling with this!