Only when restarting. While running, it runs like a champ (beyond Cortana giving me the cold shoulder, verbally).
When restarting however, I get the error without any (file.dll).
Checking the log, it appears to be the ntkrnl, which has never spelled anything good for a system. So just looking for a few hints. Just upgraded from 7 Pro.
I did reboot to get my video drivers working after the upgrade, but at that time I did not notice if it was already crashing or not.
I suspected it might have come from trying to reinstall my drivers for sound, trying to get Cortana to speak with me - so I completely uninstalled the sound drivers and let Windows put it back, still no go. Again, it has not crashed while being used and it has not slowed/had errors. Only when I try to shut it down or restart.