Today I tried to update my Windows 10 insider preview (fast) system to the latest build. During the first attempt I received a BSOD and rollback. After multiple reboots and cleanups (such as removing kaspersky) I was able to do the update again.
The update completed, since I once had the "hi" screens after login, however after a reboot I am not constantly getting the spinning white circle. (left for an hour), no desktop. This is the 2nd stage with blue background, not the initial loading windows flag. I've since rebooted a few times, but ... nothing ...
I booted a windows 10 USB to attempt to run recovery options but received a message that an update was in progress ("it looks like you started an upgrade and booted from installation media"). I was unable to revert to a previous build, and startup repair didn't help. I can get to the command line but other than copy files there's little else I can do (system is *of course* all backed up anyway to crashplan, and non system drive data looks intact in any case)
Any tips - other than a clean install? perhaps not such a bad thing after over a year of insider builds....