Windows 10: black screen with curser

i am running windows 10 with 2 monitors, i turned on my computer and one monitor is black the other is black screen with a curser that i can move around. only way to turn computer off is to hold power button down, i have no other options. i am trying to repair, uninstall updates etc, trying to load the repair options through a USB but when it comes up it wants a password, i don't have a password, i did log into the login screen with a pin but that pin does not work as a password,

:)

 

Black screen and Blinking curser after upgrade

Original Title: Blinking curser

At first startup after updating to Windows 10 screen is black with curser blinking in upper left corner. No response from mouse or keyboard. What is the solution?

 

Black computer screen with curser

Hi Margaret,

The black screen error that you encounter can be due to a corrupted update installation. To get your device working, we suggest that you follow the steps found on this

link under Black screen after sign-in and you can see a mouse cursor provided by
Sharath Srinivasa.

We'll appreciate if you can send us an update.

 

black screen- win10 no curser-no log on screen Win 7> 10

Thought I had this problem solved even posted successful results. Went through all the suggestions including Reset and Reinstall 10. Nothing worked.The black screen- win10 no curser-no log on screen still persisted. I have to do a hard reset to boot.
Now what. Did not as yet upgrade the bio. All this should not have been necessary. any real answers?