Black Screen with White Dots and Rotating White Cursor

Performed BIOS update from A04, when computer needed to reboot, it also said it was performing updates, which I assumed were window updates.  I left the computer overnight and when  I returned the screen was black with white dots being drawn on screen by a blinking rotating cursor as if it is performing some update.  The screen is filled with:

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As the cursor rotates several times, it puts another dot on the screen at the location it was rotating.  The cursor rotates using the characters / | \ 

Is this an update being performed or this indicating some boot issue after BIOS update.  I started the BIOS update 20 hours ago.  While I was watching it, it was performing an update 12 out of 20 and it took over 2 hours to get to update 14.