"i change the bios settings to boot from cd/dvd rom and i could hear the disk spinning but then it went on to the same windows screen again it keeps doing this"
When you went into the Bios and selected the CD Drive As First Boot Divice did you save the Bios Settings (F8)?
Then When you obviously reboot you should seen on the screen "Press Any Key To Boot From CD"
Hoping to press Space or what ever it should take you into the setup process.
Have a read here: