Best case scenario, those steps will get you up and running. In some cases your computer may display a graphic while it starts. I have had this problem myself and the workaround was to install from USB. As you can see, there is a First, Second and Third Boot Device.
Any country that participated in the Hague Convention designates an authority that can issue apostilles. Use whichever keystroke is indicated on screen. Changing the boot order on a PC is mostly done in order to boot from a recovery disk or from an OEM disc to run some kind of Windows repair software On. To fix it, you need to manually start Windows Installer. The next step to install or reinstall the operating system is selecting this medium to boot our PC. If you are in doubt, it may be best to consult a trained PC technician. If you are using a DVD and have disable secure boot I would try installing from a USB drive.