private/Test-IsWindows1126H1.ps1
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function Test-IsWindows1126H1 { <# .SYNOPSIS Tests whether the operating system is Windows 11 build 26800 .DESCRIPTION Queries Win32_OperatingSystem through CIM and checks that Caption contains Windows 11 and BuildNumber equals 26800. Returns $false when CIM data is unavailable or either value does not match. .EXAMPLE PS> Test-IsWindows1126H1 Tests whether the current operating system is Windows 11 build 26800. .INPUTS None. This function does not accept pipeline input. .OUTPUTS System.Boolean. Returns $true for Windows 11 build 26800; otherwise, returns $false. .NOTES Author: David Segura Company: Recast Software Version: 1.0.0 Date: 2026-08-28 The build check compares the BuildNumber string and does not inspect the update revision. #> [OutputType([bool])] param () $os = Get-CimInstance -ClassName Win32_OperatingSystem -ErrorAction SilentlyContinue return ($null -ne $os -and $os.Caption -like '*Windows 11*' -and $os.BuildNumber -eq '26800') } |