I don't know whatever happened with my windows 10 system recovery disk. I have made the system repair disk that seems to work and a backup of windows 10 in two DVDs that are empty (why it didn't work?), so useless. I googled and found this
Since your PC did not come with W10, when you get to the part of the installation process that asks for a product key, select the 'I don't have a product key' option, and W10 should install and automatically activate once you are connected to the internet.
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