how to get a command prompt without an OS on computer

rahoiem

Reputable
Aug 4, 2014
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4,510
So basically I have built my computer (with much help) and now I have a complete computer minus the Disk Drive. I have my WIN OS (8.1) on a flashdrive and am aware that I need to make a bootable USB device but I need help doing that as every list of directions I find is intended for computers with a previous OS and mine is brand new and has none. I can't seem to find where to enter command prompts or anything like that. It is a Gigabyte motherboard. Any help would be greatly appreciated.