My computer flashes blue during boot
I own a Toshiba PC that has Windows 7 installed. Just the other day, it started flashing the screen blue whenever I try to boot and eventually it does not boot. I thought the problem was temporary and attempted to restart it severally but I am not able to solve it. I have removed the battery and tried booting while connected to power and still no solution. Could it be a virus? Or is it a hardware issue? How can I retrieve my files?