Black screen after log in

You will want to go back to a restore point and pause the updates for at least 30 days.
Many users reporting black screens.

https://support.microsoft.com/en-ca/help/12415/...

Make sure you are NOT connected to internet when doing this.
To do this boot to a recovery disk or Windows media.
Go to Troubleshoot - Advanced Options.
From there you will see a restore point.
Revert to 2 weeks prior.

Still NOT connected to Internet
Once you are able to login go to Start - Settings - update and security.
Then advanced options and pause feature updates.
Now you can connect to Internet.

Hi Koranger,

Start your PC, just as Windows attempts to load (spinning dots), press and hold Power Button for 5 - 10 seconds to perform a Hard Shut Down

Do this twice

On the third start Windows will boot into the Recovery Environment and from there you can access System Repair, Safe Mode, Command Prompt . . . etc.

Please try each option one at a time, then see of Windows will boot . . .

Go to Troubleshoot - Advanced Option - Startup Repair
See if Windows startup can repair itself

Go to Troubleshoot - Advanced Option - System Restore
Check to see if you have a restore point you can go back to

If you do not have a Restore Point, go to Troubleshoot - Advanced Option - Startup Settings and click Restart
Upon restart, press 4 to enter Safe Mode
Once in Safe Mode, backup your data if you do not already have a backup
Open Device Manager and check to make sure all your Drivers are up to date
Reboot to see if Windows will start Normally

If the above fails, go to Troubleshoot - Advanced Options - Reset this PC
Choose to keep your files and apps, just your files or to keep nothing
Then start the Reset

Do this at the sign in screen:

Hold down the shift key on your keyboard while clicking the Power button on the screen.
Continue to hold down the shift key while clicking Restart.
Continue to hold down the shift key until the Advanced Recovery Options menu appears.
Click Troubleshoot

Click Advanced Options

Click Startup Settings
Click Restart
Press (4) to Enable Safe Mode
Wait while Windows 10 starts in safe mode.
Log in

Boot to the Windows 10 desktop
Press Windows key + X
Click Device Manager
Expand Display adapters
Right click the current display adapter
Click Properties
Click Driver tab
Click Rollback driver if the option is available

If not
Right click the current display adapter
Click Uninstall
Check the box that says, "Delete the driver software for this device.”
Exit Device Manager
Restart

Go to Start -> Settings -> Update & security, then Check for updates and install any available updates.