Windows 7 Ultimate was the most powerful and feature-rich edition of Windows 7. It combined the entertainment features of Home Premium and the business capabilities of Professional, including the ability to run many Windows XP productivity programs in Windows XP Mode. It also added BitLocker, which provided full-disk encryption, and the ability to work in 35 languages with its Multilingual User Interface (MUI) packs.
Windows 7 Ultimate was ideal for people who needed the security and functionality of a business operating system while still enjoying the multimedia and entertainment features available in Windows 7. It was also suitable for enthusiasts who demanded the most from their computing experience.