This is a Windows 10 Pro 32 system.
I set it to go into Safe Mode and that worked OK.
Now, when I reboot, the normal boot screen shows up.
By "normal" I mean that first a background picture with the date and time superimposed shows up.
I'm used to that and normally press "up arrow" (perhaps any key) and the login prompt appears.
NOT SO NOW!
The screen changes (the date and time go away) but there's no login name or password or *anything* just the nice picture.
In the lower right-hand corner there are two icons. One is the network icon and one is the Accessibility Features icon. There is no "power" icon. So, using restart with shift key isn't available.
What I've read is that one wants to get back into Safe mode in order to change the boot mode back to normal.
I have booted to a Windows 10 DVD and find nothing that does anything useful.
For example, "shutdown" isn't recognized from the command prompt - so no "shutdown /r /o"
The system was unable to go back to a Restore Point.