Question: how to boot safe mode windows 10 from bios?
Answer: F8 or Shift-F8 during boot (BIOS and HDDs only) If (and only IF) your Windows computer uses a legacy BIOS and a spinning-platter-based hard drive, you may be able to invoke Safe Mode in Windows 10 using the familiar F8 or Shift-F8 keyboard shortcut during the computer's boot process.