[Computer fails to boot and display is blank]

Also, not only is my display not working, the computer fails to boot since the scan.  The solution needs to somehow undo the results of the last scan automatically, since I can't see anything on the display and the computer, as best as I can tell, will not boot up.

[Computer fails to boot and display is blank]

Thanks, but I can't perform any of the steps described in the link, since my display is not working after the scan.  Is there anything I can do without having the use of a working display?

[Computer fails to boot and display is blank]

Hello.  I recently downloaded Malawarebytes on an HP laptop running Windows Vista Home Premium.  After my first scan, I shut down the computer.  When I tried to restart the computer, I was unable to do so.  The computer appeared to hang on boot.  Moreover, the display is blank.  It appears there is no signal to the display, and it simply does nothing when I turn the computer on.  I tried to connect to an external display, but the external display similarly did not detect any input from the computer.

 

As this problem arose only after I installed and ran Malawarebytes, I suspect the initial scan deleted a critical registry key or other file necessary to activate the display and boot the computer.  Obviously, I cannot see anything on the screen, so I do not know if there is any error code.  

 

Please help me resolve this issue.  Note I cannot perform any tasks that require a working display.  Thank you.