As of April 2016, Windows 7 still has a whopping lead of 47.8% of the total market share. How much impact will Windows 10 have; after 9 months Windows 10 is currently has 15.3% of the market share for all operating systems including Mac OS, with Windows 8 at 3.19% and 8.1 at 9.85%. Windows XP still has 10.6% and Vista only 1.4%.
Note: For the same 9 month period after Windows 7 was released its market share was at 15.85%. So at this point the difference between Windows 10 and Windows 7 growth cycle was negligible.
Only a very few of the XP users who purchased a new PC late in 2006 or early 2007 may have hardware capable of running Windows 10. Vista users more than likely have the hardware that could run Windows 10 but with only 1.6% of the market they are not a factor and since Windows 10 is not a free upgrade for either XP or Vista these users most likely will not upgrade.
Clearly if users choose to update to Windows 10 it has to come at the expense of Windows 7 and the “Free Upgrade” offer ends on July 29th 2016, after that users will have to pay $$$ to upgrade their computer to Windows 10 which may slow down the growth of Windows 10. New device sales must now play a significant part in the growth of 10, especially from back to school sales and the traditional holiday sales in the fall of each year.