I am an IT provider for about 150 small shops here in teh Foothills above Sacramento, and in every case when new computers come in I get a call to install XP Pro. Because they have legacy software that must run on these systems, and this software created by consultants, or companies that are no longer in business will not run on Vista or Windows 7.
I have instead taken a live boot Ubuntu CD with a special configuration of WINE, and have run ALL these Legacy Apps. 100% Compatibility.
That is why These shops and I will move to Linux when XP Pro service is no longer provided.
Vista is not a bump, windows 7 is not a bump they are dead ends !!!!
They force shops who have perfectly good computing equipment to junk those computers well before their time, and force extra cost onto these shops that are already struggling!!!
Microsoft windows is for large corporations only, IMHO. LINUX if is for the rest of us.