Start the install process
1 Reboot for media
If you’re running Windows 7, or have Fast Boot disabled, insert your boot media and start your PC. Look for a ‘Press any key to boot from CD or DVD’ option – even if you have booted from a USB flash drive. Press any key on your keyboard and you should find that the Windows install process starts.
2 Tweak boot options
If you boot back into Windows, restart your PC again, but this time press a key, such as [F11], when prompted to open a boot menu. Once you have done so, select your boot media – choosing UEFI if that option appears – to boot; otherwise, enter setup so that you can change the boot device order.
3 Windows 8.1/10
If Fast Boot is enabled on your computer, open Settings in Windows and then navigate to ‘Update & recovery’ > Recovery, then click ‘Restart now’ under ‘Advanced start-up’. When the boot options appear, choose ‘Use a device’ to select the USB flash drive or DVD you created from the list that appears.