I'd recommend starting in Recovery mode to see if Windows requires repairing. To do that, press and hold the power button for 10 seconds until the PC turns off. The press the power button again so it begins to start. As soon as you see a sign that the PC is starting the boot process, like seeing the manufacturer's logo, press and hold the power button again for 10 second until the PC turns off a second time. Repeat this process one more time, pressing the power button for 10 seconds until the PC turns off as soon as you see an indication that it is rebooting.
Now, press the power button one more time and Windows will enter the Windows Recovery Environment. Select Troubleshoot. Then select "Advanced options", then "Startup Settiings", then "Restart". Once the PC restarts, you should get multiple options, one of which is the option to enable Safe Mode (Option 5 or F5). Here's an article describing this process: https://support.microsoft.com/en-us/help/12376/...