What fixed "Windows 10 Black Screen After Login" for me.

I've run into this issue every once in awhile, where logging into Windows 10 is very slow, and after I get past the login screen, I just get a black screen. I see my cursor, and can launch the Windows Task Manager, and can run some EXEs, except for explorer.exe. This seems to happen after a reboot, but I couldn't find the cause. I usually have to re-install Windows to get over it, but after running into it again, I found a new solution online.

The solution I read online was to disable the App Readiness service. The service description says it "Gets apps ready for use the first time a user signs in to this PC and when adding new apps." I went ahead and tried this while stuck at the black screen by going through the following process.

1. Launch the Windows Task Manager by using Ctrl + Alt + Delete.
2. Go to the Services tab, right-click on any service, and click on Open Services.
3. Look for App Readiness, right-click on it, and click on Properties.
4. On the properties screen, click on Stop, change the Startup Type to Disable, and click on OK.
5. Close services.
6. On the Task Manager screen, click on File > Run new task, enter "shutdown -r", and click on OK. If you want to abort the shutdown, after initiating it, use "shutdown -a".
7. You should now be able to login normally.