Windows 2000 was introduced in 1999 as a new operating system in the NT family. It was more stable than Windows NT 4 and included many new features from Windows 98 like a My Documents folder and My Network Places folder on the desktop. Some key new features included system file protection, USB support, easier troubleshooting options, encrypted file system for security, and power management features. The desktop interface provided access to common programs and files through icons, the taskbar, and start menu.