Looked into UEFI / EFI commands and learned there's a method to remove stored entries in the EFI NVRAM via Ubuntu (used Mint Linux live USB in my case) - efibootmgr. Disabling UEFI in BIOS allowed legacy USB drives to boot and vice versa. My best guess was that the NUC's EFI NVRAM got corrupted somehow.Īfter reading the work-around here regarding plugging in 2 USB drives I was able to get the NUC to now at least boot from a USB drive again and could install an OS. Tried updating BIOS to the latest firmware, pulling battery, and holding down power button but didn't fix the issue. Also noticed no legacy boot options were showing in the NUC's Visual Bios regardless if legacy boot devices were attached. In any event, I noticed anytime I plugged in a USB boot stick now it would show up as a "UEFI : USB : UEFI : USB : USB Verbatim USB device." or similar (can't remember exactly) and wouldn't boot via the USB menu. Just before this occurred I also had wiped the NVME SSD partition using GPARTED via Mint and creating a new GPT partition. Issue started occurring after attempting to install Windows 7 via the SATA port (or possibly via a Clonezilla Debian USB image). Was having the exact same issue on a new NUC5i5RYK that I received recently. Can anyone steer me in a good direction on this? Thank you in advance. I have also done an F9 Bios reset to defaults without any success. I have also tried the USB sticks in every USB port on the Nuc. I have toggled just about every setting I can find in the bios that relates to booting or to USB. I can, however, boot from a Legacy USB CD-ROM drive without issue.Īlso, when in BIOS, no boot drives show under the legacy screen, even when one is plugged into the USB port. I have confirmed that all the thumb drives I have created will boot okay on another machine, so the drives appear to be okay. If I select that, I get about a half second black screen, then I'm returned to the F10 boot options screen to try again. The drive will appear as a UEFI device: "UEFI : USB : UEFI : USB : USB DISK 2.0 PMAP : PART 0 : OS Bootloader : PART 0". When I plug in a USB Thumb Drive to boot from (Linux, Acronis Backup, Spinrite, etc), I get NO legacy boot options on the F10 screen. In BIOS, both UEFI and Legacy boot are enabled Under boot conf, USB and OPTICAL Boot devices are checked secure boot is disabled. But booting from a USB stick is a different matter. Machine boots just fine from the SSD and operates normally. Specs: Nuc Box says NUC5i3RYK Bios says "Desktop Board NUC5i3RYB" Bios Version: RYBDWi35.86A.0369.2018.0305.1050 (latest) 8GB RAM M.2 SSD. I have searched and read just about every post I can find about problems booting from USB sticks, but I can't seem to solve the problem on my Nuc. When selected at startup, it boots straight into the Windows installation.Hello everyone. To display the full list of switches, type xcopy /? f - Displays full source and destination filenames while copying. s - Copies directories and subdirectories except empty ones. This copies the Windows installation files onto the USB flash drive, it may take several minutes. G:\boot bootsect /nt60 d: (Where "d" is your USB drive letter)Ĭopy all files from the Windows CD to the USB flash drive using xcopy cd\ Insert your Windows DVD into the optical drive.įrom Command Prompt, enter the following: g: (Where "g" is your DVD drive letter) SELECT PARTITION 1 - Selects partition 1.ĪCTIVE - Marks the current partition as active.įORMAT FS=NTFS QUICK - This formats the partition. SELECT DISK X (Replace X with your USB flash drive number, we are using 2 in this example).ĬREATE PARTITION PRIMARY - Creates a partition. In the image below the USB flash drive shows as Disk 2. LIST DISK - This shows the disk number of your USB flash drive. When the Command Prompt opens, enter the following commands followed by Enter: Select Start and type CMD in the search field, right click on CMD.exe and select Run as administrator.Īlternatively, go to Start > All programs > Accessories > right click on Command Prompt and select Run as administrator.Ī User Account Control (UAC) dialog Window may appear. Warning: Following the remaining steps results in all data on the USB flash drive being lost. Ensure that you back up any data to another device before proceeding.
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