I was attempting to resolve an ongoing blue screen problem which seemed to be related to graphics drivers. I began to follow instructions from a Youtube video related to the particular problem. The first instruction was to 'Enable safe mode with networking'. I selected this option. I got a black command screen, which wasn't what should have happened. I shut the computer down. I now have a problem where the PV begins to boot. My name appears and I am invited to sign in. When I do so, the screen goes black and nothing else happens. I've tried pressing F12 for the Dell Support Assistant. It doesn't appear in the menu. I am unable to enter the Windows 10 recovery screen in order to try a System Restore. Any advice would be greatly appreciated.