@JohnSt
Hi,
This issue can be caused by a failed Windows update.
On another PC, download the Windows 10 media creation tool and use it to make a win 10 installer on USB.
Restarting windows while its doing anything to do with a restore isn't a good move.
Getting to safe mode from USB is inconsistent, sometimes the star up options menu is there, sometimes it isn't. Here are the instructions so you can try:
boot from installer, on 2nd screen after languages, choose repair this pc, not install
choose troubleshoot
choose advanced
choose start up options
hit the restart button
choose a safe mode (it doesn't matter which) by using number associated with it.
Pc will restart and load safe mode
Hope above information can help you.
============================================
If the Answer is helpful, please click "Accept Answer" and upvote it.
Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.