Now I remember exactly how and when I lost my activation. On Jan 5th, I activated my Deluxe version on my new desktop PC. It was a Sunday and I had some time. Right after, I installed all latest Windows 10 updates. I remember how long it took to install. I waited until dinner time for the Windows 10 update to complete.
And that's what it took to wipe out my activation. So, WARNING, backup your PC before major Windows 10 update!!!!!! I was not aware of the need of a backup because it is a new PC.
