Hangs

My Toshiba Satellite hangs on boot after updating to 5.0 BIOS they recommended after update to Windows 10. I went back to BIOS and tried to default back but didn't work. I tried to restore laptop but did not work. Can I flash the BIOS with the old version?I'm skeptical since the update flash...

Hello al What could be the issue of this acer 5552g laptop. After I turn the laptop off, it won't start immediately. I press the power button I hear the it looks for the dvd but the screen is totally black (not powered black). After some 20 to 30 minutes it starts again. I entered the bios...