2001 Launch, Invention Windows Messenger is released, and is shipped with Windows XP. This is an integrated version of MSN Messenger (2h 10min, jan 7, 2001 y – 6h 30min, mar 17, 2001 y)
Added to timeline:
Date:
2h 10min, jan 7, 2001 y
6h 30min, mar 17, 2001 y
~ 2 months and 9 days