You can either burn this
ISO to a disc as an image, or you can burn this
pre-compiled version as a data disc. Then go into the BIOS and set your computer to boot from CD ROM, put the disc in the drive, and start your computer up.
To set the computer to boot from CD ROM, enter the BIOS by tapping Del or Delete when the system is starting. Find "Boot Device Priority" or something similar, and change the first option to "CD ROM" or similar. Then press F10 and type "y" or select "yes" to save changes.
If you need any further instructions, just ask.