I accidentally shut down my PC (windows 10 64) while it was Preparing to install or installing (KB4019472). Afterwards it would not restart for several automatic attempts, then it did it's own start up repair, and check disk, to which afterwards it did start, but things are definitely not working correctly. Like first and foremost I can not open my start menu, and many of my programs. My main question is this. I upgraded to 10 from 7, then migrated to SSD: IF I reinstall just 10 from USB will it recognize COA/Product Key in BIOS or do I have to reinstall 7 first? Also on same PC I swap out SSD's/HDD's that contain other OS's ie: 7, xp 8,1, and will that create any issues?