Windows 7 was launched in October 2009, but since then Microsoft has had to deal with the fact that that a lot of PCs around the world still use the much older Windows XP OS. Today,
StatCounter's website shows that, for the previous month of June 2012, Windows 7 is now finally installed on the majority of PCs worldwide, with 50.2 percent. Windows XP, launched nearly 11 years ago, is now inside 29.91 percent of PCs, according to StatCounter.