How to tell which version of Microsoft Windows your computer is using? There are a number of methods you can use to determine what version of Microsoft Windows “Operating System” or “Version” your Computer, PC, Laptop or Tablet is using. We show you two methods. At the moment, the only Microsoft Windows version likely to still be working are as follows Windows 10 (Home, Professional (Pro), Enterprise, mobile) Windows 8.1 or Windows 8 (Pro or Enterprise) Windows 7* (Home Basic*, Home Premium*, Professional*, Enterprise*, Ultimate*, Starter*) Windows Vista (Starter^, Home Basic^, Home Premium^, Business^, Enterprise^, Ultimate^) Windows XP  (Starter*, Home*, Professional*) Windows Server (2016, 2012, 2008, 2003*, 2000*) * Obsolete and Not Supported ^ Not Supported from October 2017 A full and comprehensive list can be found here:  https://en.wikipedia.org/wiki/List_of_Microsoft_Windows_versions Method 1 – Restart your computer and check the startup screen When you switch on or restart your computer, the windows version is easily determined by the images and layout of the startup, login and desktop images. Windows 10 Windows 8 Windows 7 Windows Vista? Windows XP Method 2 – Using the “Run” or “Search” box Depending on the version of windows, firstly find the “Search” or “Run” box, and type the word winvar and hit the Enter or Return button. A popup-window should appear that confirms the version of Windows your computer is running. The “Winvar” command will work on all versions of Microsoft Windows How old is my Windows PC? :jk: