What do you mean that you can't boot from the disk? Does the disk spin up and then give you an error? If so, the disk might be damaged.

The other issue is that your computer isn't configured to boot off of the CD. You will need to change this setting in your system's BIOS(basic input output system).

To do this, start your computer and watch the screen for something like:
"To enter setup mode, press DEL"

It's probably DEL, but it may be F2 or F11, the screen will tell you.

This takes you into your BIOS configuration.

Note: When in BIOS, if you don't know what it is, DON'T CHANGE IT. You can seriously mess things up. If you accidentally change something, you can hit ESC, and choose "don't save"

What you are looking for is an option for "Boot order". Just move around in the menus until you find it, just don't change anything while you are doing this.

Once you find it, change the boot order to:
1) CD
2) Hard drive

After you change it, hit ESC and choose Save settings.

Now your system will look for a bootable CD in the drive, and boot off of that before it goes to the hard drive to load Windows.

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