Please download screenshots from here
1 - First you need to have the ISO image of a startup disk
2 - Set a program to record the startup disk - ImgBurn (Free software download on the official website http://www.imgburn.com)
- installing with advertising other applications , be careful.
3 - ScreenShot (1) - Press Write image to disc.
4 - ScreenShot (2) - a) Specify the path to the ISO image
b) Specify the minimum speed (4x for dvd disc)
c) Click on Play (record)
5 - Wait. Startup disk is ready.