@desiree reboot your computer, see if that gets you to a point where you can actually update the BIOS. If the issue persists, or your computer doesn't reboot, there might be a USB port on the back of your machine (assuming it's a desktop, laptops don't usually have this) where you could flash the BIOS off of that drive. Just find a BIOS for your brand and model of motherboard. Failing that, try removing your CMOS battery (the little button cell battery in your motherboard) if it'd accessible, that should force a flash of whatever bios your chipset shipped with.