Many HP business systems (EliteBook, ProBook, ZBook) include – a hardware-enforced BIOS protection. If you interrupt boot too many times, Sure Start may restore a factory BIOS image, resetting boot order. This can break Safe Mode attempts. Solution: Enter BIOS (F10) → Security → Sure Start → Temporarily disable during troubleshooting.
On older HP machines running Windows 7, you can use the F8 key, but timing is critical. hp boot safe mode
After the PC restarts to the "Choose an option" screen, select > Advanced options > Startup Settings > Restart . Many HP business systems (EliteBook, ProBook, ZBook) include