Windows 10: Can't Upgrade Windows 10 from 20H2 21H1

Current version is 20H2 Build 19042.867Window Update shows the upgrade to 21H1Clicking on it gets to the restart point.Restart quits at 7% then say could not update.Update and security shows failed to update Error 0X8007003Ran Troubleshooter. Results negative. Results in Troubleshooter error 0X80070483Any suggestions welcome.Thanks!

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Windows 10 upgrade problem, no input accepted

I really hate having to come here and ask for help, but I really am stumped. It hurts my geek pride. I have a PC with fairly modern hardware in it. It has a p8p67 pro in it. I have tried upgrading windows 10 on it twice now. Both times I have had the same result.

After windows finishes upgrading it goes to the log in/set up screen. I can't do anything. No keyboard or mouse input is accepted.

I will list some, or hopefully all, of the troubleshooting steps I have tried:

• Move keyboard and mouse to different USB ports.
• Try different keyboard or mouse.
• Restart computer, repeatedly.
• Google for related issues.
• Update Bios, because why not.
• Create boot media and revert to windows 7.

The windows 10 system restore boot media works fine with keyboard and mouse. All USB ports work in windows 7. I don't know what is wrong. I suspect that windows 10 is lacking a driver of some sort, but since the computer accepts no input I have no way of checking for which driver let alone installing it.

Please help me figure this out. If I have to revert back to windows 7 again, I am not going to get it upgraded to windows 10. Thank you in advanced.

 

KB5000736 Windows 10 Insider Beta Channel Build 19043.844 (21H1) Insider

Im on windows 10 pro 2004 insider Dev Channel build 21313.rs.prerelease.210209-1440.
How do I upgrade to version 21H1 without losing all my files and installed programs etc?
Do I have to upgrade in steps? Going from 2004 to 20H2 then to 21H1 or..?
I have NO updates in my windows update settings being offered now or in the past and I have been in the Insider program for at least 3 months now..it justs keeps updating my 2004 version with new builds..Not upgrading me to 20H2 or 21H1. Please let me know the easiest way to do this or if in your Opinion I should just stick with 2004. I really like to be on the Latest version of Windows possible. Ty.

 

KB5001330 Windows 10 Insider Beta 19043.928 21H1 and RP 19042.928 20H2 Insider

Dism get capabilities ... "Capability Identity : Analog.Holographic.Desktop~~~~0.0.1.0State : Not Present"

Subsequent trial to remove it (against better knowing) logically yields
Error: 87A Windows capability name was not recognized.