Now perhaps give it some time, let it load so you can do the next step properly.
Altough you will not see it, your PC will be now at the desktop. So just pretend that you're on the login screen press enter, then enter your password (if you have one) and then press enter again. This was also happening to me and here is how I fixed it: When the black screen appears the login screen should originally appear but due to a bug with multiple monitors it does not. Now this problem is most likely happening because you have multiple monitors. Hey guys I think I have found a solution: