> when i select USB HDD and hit enter, the screen goes blank for a half second, > shows no message, and simply shows the boot menu again: > > Boot Menu > ========= > ATAPI CD0: MATSHITADVD-RAM UJ8E2 > ATA HDD0: SAMSUNG HN-M101MBB > USB HDD: Generic Flash Disk > PCI LAN: Realtek PXE B03 D00 See if these help: https://forums.lenovo.com/t5/ThinkPad-11e-Windows-13-E-and/Updating-the-BIOS-via-bootable-USB/td-p/1139231 https://www.romanzolotarev.com/openbsd/geteltorito.html Andrew