My new win 10 install id sailing along just fine and it did activate just fine.
The old install was fraught with issues as listed below:
Cortana and Store did not work, finally got them working and photo and explorer developed issues.
Win Explorer would randomly close when clicking on external drives.
Computer could not recognize any digital cameras, you could put sd cards in card reader but then you were subject to explorer crashing
Upon boot the computer took awhile to connect to internet.
Start menu had a mind of it's own and would open when it wanted to, but could be stubborn and open and then close real quick.
Driver for sd cards would not run most of the time, when trying to update windows said the current driver is the most current.
Browser windows/tabs were acting strange.
I did check for for viruses and nothing, all the issues were fixed when doing a fresh install. and the fresh install took but a few minutes to do. I first backed up ll my emails and favorites and made a list of installed software.