I have this installed on my HTPC and a partition on the desktop. The other week I was watching a vid, when suddenly my HTPC starts shutting down and then begins installing the OS. I wondered what the hell was going on. Then yesterday, I was on the desktop and open Windows 10, get a few updates and then the same thing happens again. Bloody annoying, as I just spent 4 hours coping data from one drive to another and then had to do it all over again. I assume one of the updates triggers this, thus upgrading the build.