Figures from StatCounter show Windows 7 has finally become the world's dominant operating system.
Windows 7 is on just half the world's machines while Windows XP trailed behind at 29.9 percent.
Windows 7 has been a slow burner, despite the fact that it had better reviews than its predecessor, Vista. Many hung on to Windows XP because it played nice with their existing systems.
However, the writing has been on the wall for XP for a while now and Vole is not going to support it after April 2014. Microsoft has warned businesses and schools to upgrade to Windows 7 as soon as possible.
It will be interesting to see what happens when Windows 8 comes out.
Normally it would mean that there will be some slide away from Windows 7 as the early adopters rush to buy the new operating system. That could mean that Windows XP still appears to be in the lead.