The downside of buyin a computer on wich all is installed already...also reason why i never buy such again (i had a PB once, it came with restore cd's..if you use those all partitions etc. you made will be gone..also you have to update windows etc. again).
But anyways as Caboose already said: find out wich products they are exactly (manufacturers and type, it will probably tell you when you go to controlpanel > system > hardware) and go on a driver hunt..it's the only way