Can't set default boot to USB on Asus P7P55D-E LX motherboard

We have a machine with an Asus P7P55D-E LX motherboard. We're trying to set the default boot device to a USB attached flash drive.

We set up "Removable" as the first and only boot device in the BIOS Boot options, but it refuses to boot, UNLESS we press F8 at POST and manually select the USB option.

Solution 1:

In Bios, it should give you the option for your USB specifically to boot from.

Try this:

In Bios, go to Advanced, USB Configuration, USB Mass Storage Device Configuration and set Emulation Type to Hard Disk.

Save and exit.

Enter Bios again, and go to Boot/Hard Disk Drives and see if USB Storage Device (it could display the name of the drive for example: Sony thumb drive)is now available in the list. Move it to the first boot slot. Save and exit.

Edit: you should probably have your CD/DVD drive as first, then your USB device after you confirm that the USB device boots up.

Solution 2:

Worked for me.

• Using the USB port right next to the Ethernet jack.
• Using a USB Win 10 install (MBR).

BIOS SETTINGS:

• Main>Storage Config>Config Sata (AHCI)
• Advanced>USB Config>USB Functions (Enabled)
• Legacy USB Support (Enabled)
• USB Config>BIOS EHCI Hand-Off (Disabled)
• Advanced>USB Config>USB Mass Storage Dev Config>Emulation Type CDROM
• BOOT>Boot Dev Priority>1st. CD-Rom
• 2nd. USB (Will have the name)

After these have been set Save and exit> Then restart and tap F8 to open the boot menu and select the named USB.

(I only have the setting like this as it worked for me and i was able to boot to the USB, I an unsure of why it worked as some setting maybe wrong)

Solution 3:

I have the same motherboard and had the exact same problem.

The only resolution to get it work was to swap between USB-ports. I ended up booting successfully from a USB port next to the Ethernet plug.