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#11
Believe in modern tech, once you are upgraded to windows 10, they id your machine and the OS stay in your machine as long as the PC is working. You can do clean install once a month or year does not matter, the idea is to get the windows 7 become legit, then everything will be fine. At this moment just hope the machine last for a long time. Do not worry about the OS part. If you have pictures and files store in one drive or google photos or whatever you feel comfortable.