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# PowerShell: Get Windows Build Number
- URL: https://www.filipkonopik.com/powershell-get-windows-build-number/
- Published: 2026-07-18T08:27:29.000Z
- Updated: 2026-08-06T05:21:54.000Z
- Author: Filip Konopík
- Tags: System Info

Need to check the exact Windows build number for compatibility checks, feature availability, or troubleshooting an update issue? This one-liner pulls it straight from the OS.

Prerequisites:

- Privileges: None
- Module: Built-in, no import needed

Quick Command:

```Powershell
Get-CimInstance -ClassName Win32_OperatingSystem | Select-Object BuildNumber
```

Example Output:

```Powershell
BuildNumber
-----------
22631
```

📦

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How It Works:

- Get-CimInstance -ClassName Win32\_OperatingSystem queries the operating system class through CIM/WMI, which holds core system details like version, architecture, install date, and build info.
- BuildNumber returns the specific Windows build (e.g. 22631 for a Windows 11 23H2 release), which is more precise than just the marketing version name and is often what you need to confirm a specific update or feature is present.
- Select-Object trims the output down to just this one property, since Win32\_OperatingSystem also returns a lot more data (like Caption, Version, OSArchitecture, or InstallDate) that isn't needed for a quick build check.

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🛡️

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