1. Does your PC turn on?
2. DO you hear your fans in the PC?
3. DO you see anything on your Monitor?
4. How far does it boot? i.e do you see the Windows screen with a blue bar going left to right.
5. Are there any error messages during the boot.
To Boot from a CD just pop in your windows CD into the CD-ROM drive, Switch on PC. at some point you should see "Press Any key to boot from CD" do so and follow on screen instructions.