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Tinkerer
You can get your computer to boot in Safe Mode in a number of ways, but in this case, you can do the following:
At the sign-in screen, hold the Shift key down, click the Power button on the bottom-right, and select Restart.
If you cannot see anything on the screen because of a black screen, then start your PC, as the blue Windows logo appears, press the power button and reboot again. Repeat these steps three times until you trigger Windows 10 automatic repair. Follow the on-screen directions and launch the advanced options menu.
Once you're the advanced startup menu, click Troubleshoot.
Click Advanced options.
Click Startup Settings.
Click the Restart button.
On the Startup settings, press 5 or F5 to enter in Safe Mode with Networking.
Once your computer is in Safe Mode, you can try the following troubleshooting steps:
Another issue that can cause your computer to experience a black screen is a buggy graphics driver update, which you might have received through the Windows 10 update. Other times there isn't a problem with the update, but the video driver may have got corrupted causing to malfunction and display a black screen.
If the video driver isn't working correctly, you can uninstall it in Safe Mode, and then let the operating system reinstall the driver automatically upon restart.
Right-click the adapter and select Uninstall.
Quick Tip: You can also select Delete the driver software for this device option to remove the driver from your computer. Sometimes, this is recommended, but if the operating system can't find the driver online, you'll need to download the correct driver for your video adapter from your PC manufacturer's website.
Click OK to confirm.
Once your computer restarts, Windows 10 should automatically reinstall the video adapter driver and hopefully, the black screen will disappear.
If you're getting a black screen on a device that you upgraded from a previous version of Windows, you may need to download updated video driver from your PC manufacturer's support website to fix the problem.
Sometimes the black screen problem keeps happening because fast startup is enabled on your computer.
While in Safe Mode, you can use the following steps to disable fast startup:
Select the Choose what the power button does link on the left pane.
Click the Change settings that are currently unavailable link.
Clear the Turn on fast startup (recommended) option.
It's important to note that depending on your hardware configuration, your computer may not include support for fast startup.
If you have high contrast enabled on your computer, it could also be the reason why you're getting a black screen.
While in Safe Mode, you can turn off high contrast using the following steps:
Select None from the drop-down menu to turn it off.
Run Once process can also the be the reason of black screen after signing into Windows 10.
To terminate Run Once processes on Windows 10, do the following:
Type the following command to restart your computer:
shutdown -t00 -r
Click OK to execute the restart command.
A problem with your user account can also be the reason your computer is experiencing a black screen.
You can see if your user account is causing the black screen by creating a new account while you're in Safe Mode.
To create a new user account in Safe Mode, do the following:
Type the following command to create a new account and press Enter:
net user tempuser /add
Remember to change "tempuser" in the command for the name of the account you want.
Type the following command to change the account type to Administrator and press Enter:
net localgroup administrators admin /add
Don't forget to change "admin" in the command for the name of your account.
Note that you're using Command Prompt instead of the Settings app to create an account. This is because, for some reason, Windows 10 won't let you create a new user account using Settings while in Safe Mode.
Once you restart your computer, sign in with the newly created account. If your computer is no longer experiencing a black screen, then the problem was something on your old user account.
If this is the case, you may want to switch to the newly created account -- for more help, you can use our guide to move your files, link your user profile with a Microsoft account, and to delete the old account.
Did these troubleshooting steps help you to fix the black screen problem? Please let me know.