I have a Dell Precision Tower 5810 with Windows 7 Professional 64-bit installed. The option to upgrade to Windows 10 was included. I downloaded Windows 10 from the Dell website and burned it onto a USB stick. When I booted to the USB stick, Windows 10 began to install then the screen went blank. Now I cannot even get into setup to try to get it to boot. When I tap F2 on bootup to enter setup or F12 for selective startup, the screen is blank.