Taylor Cooper3 said:What's actually the difference between Windows 7 Professional and Windows 7 Ultimate?
First off, the cheapest option, Windows 7 Starter, is pretty crippled. You can only run three apps at once, and you're stuck with limited screen resolution—it’s basically designed for those low-end netbooks. You also lose out on Aero and plenty of other features like Windows touch and Live thumbnail, even if it does keep the updated taskbar.
The Home Basic version doesn't have those application limits, includes Live thumbnail, and offers decent networking support. If you step up to Home Premium, you get everything mentioned above, plus the Aero look, multi-touch support, and Windows Media Center enhancements.
As for the Professional version, think of it as Home Premium but with backup capabilities, remote desktop host functionality, and a few other minor extras. For those looking at Windows 7 Business or Ultimate, you're getting the heavy hitters: BitLocker, DirectAccess, AppLocker, and the ability to boot from a virtual device.