Windows 10: Show build number - how it works

The Windows 10 build number indicates the current version of your operating system. In this article we show you how to read out the number under an installed Windows 10 and in a system ISO before installation.

Windows 10: Read out the build number - step by step

You can use the build number to ensure that your system is up to date. How to find out:

1. Open the Run dialog with the key combination [Windows] + [R].
2. Enter the command "winver" there and confirm with [Enter].
3. A new window is opening up. There you will find your Windows version and the corresponding build number in brackets in the second line.

Windows 10: Show build number of an ISO file - Here's how

If you have downloaded a Windows 10 ISO, you can determine the build number before the installation. You can find the current Windows 10 ISO together with the associated build number in our download area. The information is in the table on the right under "Version". If the ISO file has already been downloaded, proceed as follows:

1. Right-click the ISO file in Windows 10 and select the Share option. The content of the ISO file then appears in a separate drive in Windows Explorer. Under older versions of Windows you can use free image tools such as "Daemon Tools Lite".
2. Then press the key combination [Windows] + [E] and navigate to the "My PC" folder. Make a note of the drive letter of the ISO file you just included.
3. Then press the key combination [Windows] + [X] and select "Command Prompt (Administrator)". If the user account control appears, confirm the process with "OK".
4. In the command prompt, enter the command "dism / Get-WimInfo /WimFile:X:\sources\install.wim / index: 1". Replace the middle part "X:" with the drive letter of your integrated image.
5. Then a list appears with all information about the Windows system of the ISO file. You will find the build number next to the "Version" entry.