Plug your bootable USB drive to your computer. You get the idea. To do this: Insert the USB drive into the USB port, and then select Start > Settings > Update & security > Recovery. Under Advanced startup, select Restart Now. Open the Advanced Startup Options screen. Only Windows Boot Manager is available in your PC boot menu while trying to reinstall Windows 7 over your preloaded Windows 10 or Windows 8/8.1 via a bootable USB drive (or USB stick), For computers using Windows operating system you can easily create a Bootable Windows USB drive or a Windows USB … Yeah that all now you bootable USB Windows 10 flash drive. Click on the “Start” button and the software will create a Windows 10 IOS image into the USB within few minutes. Confirm the BIOS boot sequence lists the USB drive first, or make that change as needed. To create an installation media of Windows 10, you need a USB drive (at least 8GB) or blank optical media like CD/DVD and, more importantly, Windows 10 ISO file to create bootable media. Microsoft once offered its own tool called Windows to Go, which could generate a bootable Windows USB drive with the Enterprise and Education versions of Windows 10. Click on the item Use a device. To boot Ubuntu from USB media, the process is very similar to the Windows instructions above. This is a freeware that is able to create a correct bootable USB flash drive. Windows 10/8.1/8/7/Vista/XP are aupported. After the USB flash drive is inserted into the USB port, press the Power button for your machine (or Restart if the computer is running). Now just plug-in the USB drive into another computer and make sure the BIOS all set up to install Windows 10 using the bootable drive. The computer will restart and start from the selected USB device. To boot from a USB drive in Windows 10, do the following. If you’re having trouble starting your Surface with the bootable USB, you can try booting through Windows. When you enable boot from a a USB device, what you are essentially trying to do is to make your computer run from the operating system that is installed on the USB device, instead of running from OS installed on the hard drive. What happens now depends on what the bootable USB device was intended for. USB Boot Not Available: If the bootable USB still doesn't appear in BIOS, it's possible that the computer doesn't support a USB boot. If you're booting from Windows 10, Windows 8, or Windows 7 installation files on a flash drive, the operating system setup will begin. Click on the USB drive that you want to use to boot from. Note Backup everything from USB driver because while creating a bootable media your flash drive will be formatted. In that case, you will need to find another USB drive and go to Microsoft's download page for the Windows 10 ISO and use burn Windows ISO to USB. To boot Lenovo from USB, some third party software like AOMEI Backupper Standard can be your best choice. Creating a Windows 10 bootable USB drive is a fairly simple process and something you should definitely do if you own a Windows computer. If you are 100% sure that the USB is bootable… Creating a Lenovo recovery USB in Windows 10 with the freeware. Start from the USB through Windows. If you're booting from a DBAN flash drive you created, it will start.