Windows Vista - http://www.vistaarticles.com
Windows Vista Version Upgrade Cost
http://www.vistaarticles.com/articles/564/1/Windows-Vista-Version-Upgrade-Cost
By 
Published on 05/11/2011
 
Unlike Windows XP, it is fairly easy to move between versions of Windows Vista.

Windows Vista Version Upgrade Cost
Unlike Windows XP, it is fairly easy to move between versions of Windows Vista. If you have a copy of Home Basic, for example, you can upgrade to Home Premium or Ultimate using a tool called Windows Anytime Upgrade — go to the Start menu and type anytime in the Search box to find it. Anytime upgrade allows you to order an upgrade online, and Microsoft will send you a disc in the post. The prices aren’t particularly keen, though: moving from Home Basic to Home Premium costs over approximately $50, even though the difference in online price between the two boxed versions is closer to approximately $20.
Anytime Upgrade is worth considering if you bought a computer with Vista pre-installed and want a better version, but otherwise we’d strongly recommend checking out the features you want and picking the right version first time — you stand to save money by doing so.