I have not yet managed to figure out the proper BIOS configuration to get an AsusPRO (desktop computer) to boot from a USB flash stick for netinstall of Debian 10. The USB flash stick has Debian 10.2; I used it about a week ago for a netinstall on another machine.
The machine was shipped from the factory with Windows7. A year or more ago I managed to install Debian 9 on the machine, overwriting W7; but I no longer remember how I managed to boot the installer. I wish to do a complete installation, and not just an upgrade from Debian 9 to Debian 10. The BOOT screen of the Asus UEFI BIOS utility has three sections which appear applicable: (1) Compatibility Support Module (2) Secure Boot (3) Boot Options Priorities (4) Boot Override In both "Boot Options Priorities" and "Boot Override", the USB flash stick appears twice: = UEFI: Patriot Memory PMAP (7643MB) = Patriot Memory PMAP (7643MB) The "Boot Override" section appears to be simply a shortcut to "Save Configuration and Reset" for each of the boot options.