B
Bertram Englert
I changed my Motherboard, RAM and CPU, and I couldn't reactivate Windows 10 Pro. I don't have a Pro Key, just an upgrade from Home License. So I reinstalled Windows to Home Edition and now want to upgrade it from previously bought Upgrade License in Windows Store. In the Troubleshoot it says that there should be a Free Upgrade Button after I bought it once, but it asks for full Retail Price again. There was no Upgrade Key from the official store, the first upgrade worked without it.Both the Home and Upgrade to Pro License are on the same account (as this account) and bought on the official Mic
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