Thanks for your input.    This is the first time in 10 years that I encountered a board that won't boot fom usb. It's especially strange since you didn't have the issue with this board.  Wht capacity usb stick did you use?  The two sticks i've used are 64 and 32GB.  I have some 8GB micro sd cards.  I'll install multisystem on one, and try it.    thanks On 4/8/19 9:32 PM, Stephen Partington wrote: > So that is unusual. I used to work for an OEM white box vendor and we > used this board in a few builds. we booted to USB frequently. One of > my roles at the time I was there was to vet machines for Linux > compatibility. > > The irony was that this board did just that with very minimal issue. I > have found in the past some Sandisk USB devices do not play nicely > with booting Linux OS's. > > Also, check your USB drive size, If it is a 16G or larger the bios may > not play nice. > > As for viable software to write the drive, I have had the best success > with using Rufus for Windows-based install drives. I use etcher for > Linux based install media. > > Note, My most successful USB installer drive is a USB 2.0 Verbatim > Store N Go. >