I've got an 4 year old Pentium 4 2.8 Ghz 496mb ram that my kids want for their use. I've got a newer Dell laptop that I want to use as an office computer. Is there something that I can use where I can just pull my laptop out of my briefcase, set it on my desk and it will communicate with a wireless mouse/keyboard and printer or do I have to plug everything in everytime I use the laptop at my desk?