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This is a bit too late for me. I already have Ubuntu on my Dell Inspiron Laptop. However this is a good step nonetheless.
My as well as my wife's experience with Vista is awful. The latest bad Vista news has been that the HP All-In-One scanner, copier, printer just refuses to work, or the printer completely disappearing from the PC 's Setup Printers. We had to completely re-install the printer.
The same printer and scanner works without a hitch in Ubuntu. No need for any special installations either. And it is a Network Connection too.
Plus Vista is slow and bloated. Actually Ubuntu takes shorter time fully booting that Vista takes time resuming from Hibernation!
The only reason I occasionally need to switch to Vista is because some web-sites are still IE only, and do not display at all in Firefox. I'll check Opera on Ubuntu.