We have a dell optiplex pc that came with windows 7 pro and was upgraded during the free time to windows 10. I had to reinstall windows 10 on it and it will not activate. I've tried everything I could find on the internet re how to activate and none work. Because it was activated before, it is supposed to automatically activate after a reinstall, as I understand it.
I can't find a way to contact msft about activation issues like I could before.
Does anyone know a sure fire way to solve this? The following might be the best article I've found on this issue, but nothing there solves the issue:
www.technipages.com
I contacted msft but without a support contract on the pc they don't care.
I can't find a way to contact msft about activation issues like I could before.
Does anyone know a sure fire way to solve this? The following might be the best article I've found on this issue, but nothing there solves the issue:

Fix Activation Error 0xC004F213 on Windows 10
Did you recently get activation error 0xc004f213 suggesting that Windows 10 could not find any matching product key? Fix it with this guide.

I contacted msft but without a support contract on the pc they don't care.
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