How do I combine more than one pc

[tinabina22]

I have 2 desktop PC's (my own and one I inherited from my mom's estate) and a laptop. Is there a way to combine the 3 of thems information without do it manually? If so how would I go about doing that and if not how would I go about doing it manually? Two desktops have Windows XP and the laptop has Windows 7.

Thank You
Tina

[The Wise Monkey]

There is a user migration tool built in to Windows that you can use to transfer user accounts between computers, and this seems to work quite well. I don't think it will work by going from Windows 7 -> XP though.