I don’t recommend having automatic update switched on (which is the default) for Windows 7. Yesterday my Windows 7 install decided to install 20 updates. It rebooted and then rebooted again and again. My guess is that a driver updated and killed the boot process.

It did try to go into the automatic fix, but this just said it could not fix the issue, maybe it was a driver issue. I could not find an equivalent to safe mode to try to delete the updates, so today I am re-installing. This time making setting a system restore point so I can rollback if the same happens again