Windows 10 reactivation has proven a nightmare for me and Microsoft!
6 months ago had a crash and had to have Microsoft intercede.
Then around 6/12 had a crash cased by UPS failure/immediate shutdown.
Recovery nor repair worked, I spent all my efforts over two 18 hour stretches, and gave in and called Microsoft. They. with me, spent the next 10 days trying all sorts of recoveries, repairs, fresh installs, and none would validate. I reached panic for my biz which is still rebuilding things now. I Said to Microsoft " Enough, I will buy a fresh product, not an update and install" Ok and we were on that path for about 5 more days before a tech figured out they installed the wrong ISO file, then installed the correct file. Microsoft has called me 3 times since to learn from this and make sure all is good as it is an issue they contributed to the extended mess and they also needed to learn from it. Make sure you use the proper iso file and leave the recovery partition alone would be my advise. In the process Microsoft said it was a bios issue, then a hard disk issue. I checked the disk in two machines and reported it is not the disk, had ASUS check the bios, not the bios. Then they said it must be the disk, So I formatted it. and with a formatted fresh install on the disk with a purchased key, it would not validate because the iso file used to install windows 10 did not match the Key I purchased - which was Windows 10 Pro. The email giving the key takes you to the page to create the media which did not work. IF I UNDERSTAND CORRECTLY YOU MUST NOT PICK WINDOWS PRO N, PICK WINDOWS HOME AND THEN IT GOES TO PRO IF THAT WAS YOUR KEY/SYSTEM IDENTITY. So at this time, few people are buying Windows 10 non-OEM, and I think things are not properly prepared ON THE WEB OR EMAILS SENT OUT OR IN THE FRONT END OF THE MEDIA CREATION TOOL ADVISE. During the early phase of Microsoft trying to get things to validate, they created product keys, did installs several times and used these keys to validate with failure. I noted here that someone had a problem with a quad 4 processor, which is the case here. In the end, I and Microsoft stuck to it to fix it, then the PC would not recognize the file history till I finagled some files per some online research to get it to list the history saved on the mirror pair I had need to recover. My advise, don't play with Mother Validation. Also, I hope it is true that they are beginning to change activation/validation to a user account rather than hardware, as I had that issue and had to call when Windows first came out. I also believe they are liable to lawsuit if they tie intellectual property to the hardware, as it is open, not like Apple, which begins and ends with Hardware first, by an only from them. My opinion is that when the dust settles on this major change up being introduced and the concepts vastly different, while trying to keep millions of PC's running and updated, they will have a better system, it's just the getting there that is breaking my back - and straining thier back. I am a 365 user, and find a similar, but somewhat more reliable change up going on there as well, with it's advantages to all - eventually!