wtf virus do i have?

I downloaded malwarebytes and scanned. It found one infection called pup casino. I asked Malware to remove and was directed to reboot. Now I just reboot to a dark computer screen. Monito ri s plugged in . I placed xp disk into cd drive but I can't do anything because I just boot to a black screen. I am using HD tv as computer screen and gfot a message "once" saying vga 7 not supported.

Nwxt morning the computer is working fine. Go figure.

thanks for letting us know