After a failed attempt to upgrade from a genuine windows 7 Ultimate to windows 10 Pro using Microsoft media creation tool, I had this message after it reverts back to the previous version of windows. [The Installation failed in the SECOND_BOOT phase with an error during MIGRATE_DATA operation]. I successfully upgraded my first laptop without any issues using windows update, however I am having issues with my second one, this usually happens when using MMCT. There are
issues and fixes to the problem that I still have to try.
other fixes.
The problem is after it reverts back to the previous version of windows, it renders windows 7 Ultimate as a non-genuine copy, and requires a product key activation. I used a tool to extract the key to re-activate it, but it says [This product key you typed has been blocked from use by Microsoft].