When i insert the disc it still says this message
If you are still getting the same message when you are attempting to boot from you installation media there is likely one of three things going on.
1. The BIOS is not set properly to boot to the CD/DVD
2. You are not hitting a keyboard key when prompted to hit any key to boot from CD.
3. There is something wrong with your installation media.
In the case of number 3 you can obtain the installation media ISO from here
Link Removed
Be sure that you get the proper Version to fit your product key and the proper system architecture (32 or 64 bit) to match the version you have installed.
Use something like ImgBurn from here
http://www.imgburn.com/ to burn the ISO to a DVD...