Windows 7 now accounts for 40.21% of all global desktop operating system usage across the world. Windows XP usage slipped to 38.64% in the month of October.
The drop in XP usage has been consistent since Windows 7′s launch but October marks the first time that Windows 7 has passed Windows XP usage, an important milestone for Microsoft after two years of Windows 7 sales.
In November 2009, Windows 7 managed to surpass Apple’s Snow Leopard market share in just two weeks.
In April 2011, Microsoft reported that over 350 Million Windows 7 licenses has been sold in 18 Months.