Windows 7 Professional

Windows 7 Professional edition was designed for small business and professional users, it has all the features of Home Basic and Home Premium editions, and it includes addition features like Encrypting File System, Logical Disk Manager, Offline files, Windows Server Domain join, Windows XP Mode, and more. Compared to Windows 7 Home Premium, Professional Edition has more RAM and CPU support. The 32-bit version of Windows 7 Professional version supports up to 4 GB RAM, while the 64-bit version supports 192 GB RAM, as well as supports up to two physical processors in the system.