I have a desktop Vista operating system as my main computer,a xp operating system on another desktop and xp on a laptop trying to network these three computers at home.using a cable internet conection and a belkin router and a hp printer.Ive tried so many different things to get this setup to work that Im afraid Ive got a lot of information on computers that is not right I want to start all over getting these systems to network.How can I wipe out all information on all three computers and start over.Any help would be appreciated.Thanks.James.