Windows 10: Windows 10 Pro upgrade failed—how do I reinstall without buying it again??

I just tried to upgrade to Windows 10 Pro on my new computer through the Microsoft store. I paid for the upgrade and started to install it, but the installation failed. I had to restart my machine, and for some reason it showed that I had Windows Enterprise installed, but it couldn’t be activated because it had the wrong digital key. Because Windows wasn’t activated, I couldn’t activate the version of Office that came with my computer or install any security updates. Nothing I tried worked. Windows online help sent me in circles. Finally, I just did a system restore back to Windows 10 Home. I

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Upgrade to Windows 10 Pro (Update Failed)

Hello

Try to use these steps to remove the SoftwareDistribution folder and redownload and then reinstall Windows 10 .

• First try to reinstall the Upgrade with your computer beign booted clean.
  How to boot clean. (read step 1)
• If that as well fails,
  try to remove your SoftwareDistribution folder (read step 4), redownload and then reinstall Windows 10
  

Let me know if it helps. This error code is appearing a lot with Windows Upgrades and the real cause needs some research.

 

Upgrade to Windows 10 Pro (Update Failed)

Howto redownload ???

My Windows 7 has downloaded it.

 

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.