E2B USB drive will not now UEFI-boot to agFM menu (but did before)

If your E2B USB drive was happily UEFI-booting to the agFM menu system before, but now your BIOS refuses to UEFI-boot to it (e.g. it does not offer any option to UEFI-boot to any partition), then the usual reason is that you have accidentally caused an extra partition entry to be added to the E2B partition table.

This can sometimes happen if you are using .cfg or .grubfm files which use the ‘partnew‘ grub2 command and you have made a mistake in the menu code (perhaps not defined the filename of one of the files?).

The easiest way to fix it is to Legacy-boot to the E2B menu – if there is an extra partition added (usually partition 4) then E2B will warn you and allow you to delete it.

Most UEFI BIOSes require that the primary MBR partitions are in ascending order and do not overlap each other. If such an extra partition is added (with a non-zero type number), then the BIOS will ignore the whole disk!

Tip: You can use the Windows utility RMPrepUSB.exe to view the MBR partition table entries ( Drive Info – 0).

New! Ventoy for Easy2Boot v1.0.97 now released!


eBooks available (in PDF format)

Easy-to-read eBooks are available in PDF format (each eBook is over 100 pages) – rated 4.5/5 stars.
Learn the secrets of Legacy and UEFI USB booting and then make your perfect multiboot USB drive.
E2B eBook #1 includes instructions on how to remove the E2B 5-second start-up delay blue screen.

E2B is unique in that it uses partition images which allows you to directly boot from Secure Boot images (no need to disable Secure Boot or run MOK manager or modify your UEFI BIOS).

Most eBooks are over 100 pages long, contain original content and step-by-step exercises which are suitable for both the beginner or the more experienced user.
Customer reviews are located at bottom of each eBook product page and multi-buy discounts are available when you buy more than one eBook. Please also visit RMPrepUSB.com and the E2B Forum.
Subscribe to my blog for the latest news, tips, USB boot articles and free eBook updates.