We all need to start from scratch sometimes and if you're building a new PC, chances are you'll need to learn how to make a bootable USB drive. This will enable you to boot your PC directly from a USB ...
Do you mean DOS or an NT command prompt? AFAIK, most BIOS updates are done in either DOS or GUI Windows. A command prompt only NT is a bit tricky, and not very useful anyway. A DOS booting USB stick ...
I tring to make a bootable usb key for memtest86. The system I making this for is mini-pc that is diskless (no cd-rom or floppy). Memtest86 only provides images for floppies (.bin) and cd-rom (.iso).