Hi
If you have your install media try this.
Boot from your DVD or USB drive.
Select, Repair your computer.
Click on, Troubleshoot
Click on, Advanced Options
Click on, Start Settings
Click on, Restart
Select, Safe Mode with Networking.
See if it will boot into safe mode.
Look at what's loading at Start in normal mode.
Windows Key + R
Type msconfig
Disable anything that isn't necessary.
Then just reboot and see if it's fixed.
It may be hanging up loading something.
If it's OK you can reactivate things a few at a time, and see if there is a problem.
If you don't have install media, download the ISO file and create a disk on another computer.
Installing Windows 10 using the media creation tool - Windows Help Select the option to create media for another computer.
If the computer doesn't boot into safe mode the disk will give you other repair options, i.e. repair and reset.
Mike