The quickest way to find out details about installed Windows is to use keyboard shortcut WINDOWS KEY+PAUSE. The latter key might be named PAUSE/BREAK on some keyboards.
Other method is to right-click (My) Computer or This PC in Start menu/screen or Desktop and select Properties from the menu.
In Windows XP, see what's written in the System section.
In Windows XP, see what's written in the System section.
In Windows Vista, 7, 8, 8.1 and 10, see what's written in the Windows edition section.
To check whether your OS is 32-bit (x86) or 64-bit (x64), see the System type line in Windows Vista and later. In Windows XP, if there's no mention of "x64" in System section, then the OS is 32-bit edition.
To check whether your OS is 32-bit (x86) or 64-bit (x64), see the System type line in Windows Vista and later. In Windows XP, if there's no mention of "x64" in System section, then the OS is 32-bit edition.
As Windows 10 receives large feature updates twice a year, you might need to find out the exact version and build information.
To do this, open Start, type winver and press ENTER. The required data is on the second line.
Alternatively, in Windows 10 Anniversary Update and newer, open the Run dialog with keyboard shortcut WINDOWS KEY+R or via the Quick Links menu (WINDOWS KEY+X), type ms-settings:about and click OK.
To do this, open Start, type winver and press ENTER. The required data is on the second line.
Alternatively, in Windows 10 Anniversary Update and newer, open the Run dialog with keyboard shortcut WINDOWS KEY+R or via the Quick Links menu (WINDOWS KEY+X), type ms-settings:about and click OK.