Windows Millennium Edition (Me)

In September 2000, Microsoft introduced Windows Me (Millennium Edition), which upgraded Windows 98 with enhanced multimedia and Internet features from Windows 2000. It also introduced the first version of System Restore, which allowed users to revert their system state to a previous "known-good" point in the case of system failure. System Restore was a notable feature that made its way into Windows XP. The first version of Windows Movie Maker was introduced as well.
Windows Me was conceived as a quick one-year project that served as a stopgap release between Windows 98 and Windows XP. Many of the new features were available from the Windows Update site as updates for older Windows versions, (System Restore and Windows Movie Maker were exceptions). Windows Me was criticised for stability issues, and for lacking real mode DOS support, to the point of being referred to as the "Mistake Edition" or "Many Errors." Windows Me was the last operating system to be based on the Windows 9x (monolithic) kernel and MS-DOS.