I need to start from dvd/cd how do i do this.

If you want to boot from cd/dvd start your pc and when the first screen comes up press delete on keyboard a blue screen will come up select advanced BIOS features then you will see the list of the order in which the pc boots highlight the cd/dvd rom drive and hit enter you will see a page where it says to set it as first or second or third boot move the dot on the right of the one that is default tby using plus on keyboard numbers on right of keyboard untill it is at first boot then hit the enter or return key on keyboard then hit the f10 key and type the letter (y) without brackets and hit enter then your pc will restart and it should boot from cd/dvd then put in the disc you want to boot from and restart the pc be very carefull doing this if you like you can go toyoutube.com and there should be videos there on how to do this