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.
