The operating system was launched on 22 October, 2009 and has gone on to sell more than 100 million licenses, making it the fastest-selling Windows OS in history according to Microsoft.
Microsoft recently reported revenues of $14.5bn for the financial quarter ended 31 March and chief financial officer Peter Klein said Windows 7 "continues to be a growth engine" — with Windows revenue up 28 percent year-on-year.
For more on this story, read Windows 7 now on one in 10 of world's PCs on silicon.com.