This windows 8.1 bootable usb drive will allow you to perform a brand new fresh install of windows 8.1, upgrade your existing copy of windows 8.1, customize your operating system and tweak your existing operating system. You also have the option to choose a Digital Guide. This will give you step by step instructions on how to make your own bootable usb. The Digital Guide option does not come with usb. All computers are configured to boot directly to the internal hard drive. A bootable flash drive only changes what the computer boots to first. Instead of booting directly to your hard drive you will be able to configure the computers BIOS boot sequence so that it can boot to the usb flash drive with windows 8.1 first. Consult your manufacture for the proper keys to press when you first power on the computer in order to boot to the usb flash drive. ALL USB 3.0 FLASH DRIVES ARE BRAND NEW. I NEVER USE PRE-OWNED, REFURBISHED OR USED USB FLASH DRIVES. Usb 2.0 flash drives may be used and 4gb-32gb They will be either a standard usb or portable wallet card usb. If 2.0 usb are out of stock we will have 3.0 in its place. Note: I am not responsible for any data that you lose if you do not save it prior to re-installing your copy of Windows. Included FAST! USB 3.0 16gb Bootable Flash Drive With Windows 8.1 32 or 64 Bit. The Digital Guide will show you step by step how to create your own windows 8.1 bootable usb. Digital guides will be sent to you through chat within 24 hours. Not Included -License, COA, Product Key, Serial Number. Flash drive looks / style / brand may vary from picture. You are not paying for the software you are paying for the usb and the time it takes to configure it.