Has Windows 10 Overtaken XP Already?
 

Depending on the method used to determine which OS people are using, Windows 10 may or may not be overtaking Windows XP already. Statcounter's numbers show Windows 10 growing from zero to 5.38 percent in August, via 7.64 percent in September and 9 percent in October to 10.82 percent now. Over the same period, XP declined from 10 percent in July to 8.21 percent now. XP's market share has shrunk to the point where it is almost the same as all versions of Mac OS X combined (8.46 percent).

http://www.hardocp.com/news/2015/11/..._xp_already63/