Hi jcs2448 and welcome to the Forum. One thing you might try is as follows.
While at the black screen with cursor, Press CTL, Alt, Del and choose to bring up
Task Manager. Look for the process "explorer.exe" and highlite and then end this task. Then while in Task Manager, click on File - at the top and choose "New Task". In the Open box type "explorer" without the quotes.
Let us know if this makes any difference.