I noticed it when it was about 32% done.
I decided to let it go to see if I liked it. I didn't.
When I went to restore Windows 7, my computer crashed and I lost everything.
I had a friend re-install Windows 7 but I had to repurchase some software downloads because he couldn't restore those.
He also installed a "Never 10" program.
Well I had been on Linux for about 10 years, on my home computer.
I have a new PC I am using now, it is Windows 10 and I am quite happy with it.
Always have multiple backups of any data (or installed programs) you deem to be essential.
You can never have too many backups. :)
“Never 10” works. It stopped Win-10 from trying to access my 3 machines.