Windows 7 is still the most widely used OS with a marketshare of 47.01 percent, and the ancient Windows XP still clings to a marketshare of 10.34 percent.
The marketshare of Windows 10 has steadily increased over the last couple of months and has nearly doubled versus the 11.85 percent marketshare posted in January 2016. Now that the big Windows 10 free upgrade push is over, it's going to be interesting to see how this evolution plays out over the next couple of months.
On a related note, gamers have picked up Windows 10 at a much quicker pace. The latest Steam hardware survey results reveal 46.52 percent of Steam gamers now use Windows 10.