Hi Alba0, Put the DVD into your drive and reboot your system when you see the dell splash screen press F12,  go to boot setup, and rearrange your drives to boot off your DVD.        
    May anyone please tell me how to configure my computer to start from the CD.ROM or DVD drive?  My computer is a Vostro 220 installed with Windows Vista Home Basic, now want to upgrade it to a Parallel Installation with Vista Ultimate. It is said need to start from the DVD drive.    If it is not too troublesome, may you please also tell me how to do the whole work in detail?   Many thanks in advance and best wishes   Alba0   I have miss-typed my old Windows Vista Home Basic computer Product Key on my new unlicensed Windows Vista Ultimate DVD.  May somebody please tell me how can I correct it?
Configure computer to start from CD/DVD drive