Every now and then Microsoft releases new minor and major updates to Windows 10 to add new features and fix reported issues. In Windows 10, like other programs, the build number changes whenever Microsoft releases a major update to the operating system. For instance, when the Windows 10 was released back in July 2015, the build number was 10240 and the build number was bumped to 10586 after the major November update.
Because build number changes with every major update, users can find out if their Windows 10 is up-to-date by checking the build number of the operating system. In short, one can verify if a major update is installed by just looking at the build number.
There are at least three ways out there to check the current build number of Windows 10. Following are the three easy ways to check your Windows 10 build number.
NOTE: Please note that this method is not useful to check if a minor update is installed or not. So, please make sure that you haven’t turned off Windows Update to automatically get updates for your operating system from Microsoft.
Method 1 of 3
Use the About Windows to know the build number
This is perhaps the easiest way out there to check the build number of Windows 10. The About Windows dialog shows Windows 10 build number along with other information.
Step 1: In the Start menu or taskbar search box, type Winver.exe, and then press Enter key to open About Windows dialog.
Step 2: Here you can find the Windows 10 build number next to version number. In the picture below, version number is 1909 and build number of 18
Method 2 of 3
Use Settings to check Windows 10’s build number
The Settings app can also be used to find out the build number of Windows 10.
Step 1: Open Settings app either clicking its icon in the Start menu or simultaneously pressing Windows logo and R keys.
Step 2: Click System icon. Click About.
Step 3: The number next to OS build is your Windows 10 build number.
Method 3 of 3
Check build number using Command Prompt
If for some reason, you are unable to find out the build number using above mentioned methods, you can use Command Prompt to know your Windows 10’s build number by executing Systeminfo command.
Step 1: Open Command Prompt by typing CMD in Start menu search box and then pressing Enter key. The Command Prompt can also be launched by right-clicking on the Start button on the taskbar and then clicking Command Prompt option.
Step 2: In the Command Prompt, type Systeminfo, and then press Enter.
Step 3: As you can see in the picture below, the OS Version field also displays the build number along with the operating system version. In the picture below, 10586 is the build number and 10 is the version number of Windows.
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