so i took advantage of mike T's dell laptop deal. all good. it doesnt come with an OPTICAL DVD DRIVE..ok whatever... i dunno. i just need something basic that will run cds....i have asked on there but its full of clever people discussing clever things...so im kinda embarrased t ask again! so if anyone will take pity on me and explain why i cant just get an external CD drive...why do i need an OPTICAL dvd drive?