Hello. I have two systems that had genuine windows 7 and 8.1 with windows 10 reservations. I upgraded both systems to windows 10 using the same ISO media and they were both activated using different Microsoft accounts. Then I clean installed both of them with the same media and now one isn't activated anymore. I'm getting Error code: 0xC004C003
When I looked up this error, apparently at the activation windows I'm supposed to click the goto store button. I did and it tells me I have a genuine copy of windows but windows won't seem to accept my key even though I verified my Microsoft account and the activation won't work!
Please advise! Thank you.