Windows 10: 0xa0000400 error when upgrading from windows 10 to windows 11 via...

0xa0000400 error when upgrading from windows 10 to windows 11 via Windows11InstallationAssistant

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Cannot upgrade Windows 11 from Windows 10 Error Code 0xa0000400

Cannot install Windows 11: After hitting Accept and Install for Windows 10 to 11 getting error code 0xa0000400.

 

Error of 0xa0000400 updating windows7 to Windows 10.

Hi Alex,

It's unfortunate that you are facing this issue. We'll certainly assist you to resolve it.

Share this information to assist you better.

• How are you upgrading to Windows 10? Is it through Windows update or ISO media?

We suggest you to refer the suggestions given by Andre Da Costa from the below link and check if it helps:

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http://answers.microsoft.com/en-us/...x00704dd/2b4a8592-4002-4561-b1c7-ab9c09c36aeb

Reference : How to Fix Windows 10 Setup Failure:

http://answers.microsoft.com/en-us/...-failure/eba3c864-d9fe-4f8e-9468-81b1f89473ed

Hope this helps, for further assistance, you can post your query in Microsoft Community

 

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.