Which version of the Windows operating system am I running?
Finding out which version of Windows you're running can help you determine which features are available on your computer. Here's how to check.
-
Click the
Start button

, type
winver in the search box, and then press Enter.
Note
If the steps above don't work on your computer, you might be running a previous version of Windows. To check, click Start, click Run, type winver, and then press Enter.
The About Windows window showing Windows Vista Ultimate edition with Service Pack 1
This window displays the version and edition of Windows you're running. Each version of Windows comes in different editions with different features. This window also displays a service pack number if your version of Windows has been upgraded with a service pack.
The About Windows window showing Windows XP Professional edition with Service Pack 3
Each version and edition of Windows also comes in a 32-bit or 64-bit version. To find out what version you're running, see Is my PC running the 32-bit or 64-bit version of Windows?
For information about features available in different versions of Windows, see Which one is right for you? For information about upgrading to the latest version of Windows, go to the Windows 7 Upgrade Advisor webpage.
If you're already running Windows 7 but aren't sure which edition you have, see Find which edition of Windows 7 you are using.