Get Windows Version Information

# CMD
ver

# .Net Library - OSVersion property of the System.Environment class
[System.Environment]::OSVersion.Version

# .Net Library - OSVersion property of the Environment class
[Environment]::OSVersion

# Check Registry
(Get-ItemProperty -Path "HKLM:\SOFTWARE\Microsoft\Windows NT\CurrentVersion" -Name ReleaseId).ReleaseId

# Check for "Windows 7/2008 R2" or later
[Environment]::OSVersion.Version -ge (new-object 'Version' 6,1)

# WMI's Win32_OperatingSystem class
(Get-WmiObject -class Win32_OperatingSystem).Caption

# WMI
Get-WmiObject -Class Win32_OperatingSystem | ForEach-Object -MemberName Caption

# SystemInfo
systeminfo /fo csv | ConvertFrom-Csv | select OS*, System*, Hotfix* | Format-List

# hal.dll
(Get-ItemProperty -Path c:\windows\system32\hal.dll).VersionInfo.FileVersion

# CIMInstance
(Get-CimInstance Win32_OperatingSystem).Version 

# Registry
(Get-ItemProperty "HKLM:\SOFTWARE\Microsoft\Windows NT\CurrentVersion").BuildLabEx -match '^[0-9]+\.[0-9]+' |  % { $matches.Values }

# PS
Get-ComputerInfo
Get-ComputerInfo -Property Windows*

# Try Catch
$version = $null
try {
    $version = (Get-CimInstance Win32_OperatingSystem).Version
}catch{
    $version = [System.Environment]::OSVersion.Version | % {"{0}.{1}.{2}" -f $_.Major,$_.Minor,$_.Build}
}

# WMI
Get-WmiObject -class win32_operatingsystem -computer computername | Select-Object Caption

# PS 2.0
$windows = New-Object -Type PSObject |
           Add-Member -MemberType NoteProperty -Name Caption -Value (Get-WmiObject -Class Win32_OperatingSystem).Caption -PassThru |
           Add-Member -MemberType NoteProperty -Name Version -Value [Environment]::OSVersion.Version                     -PassThru
"{0}  ({1})" -f $windows.Caption, $windows.Version 

# PS 3.0
$windows = [PSCustomObject]@{
    Caption = (Get-WmiObject -Class Win32_OperatingSystem).Caption
    Version = [Environment]::OSVersion.Version
}
"{0}  ({1})" -f $windows.Caption, $windows.Version

# Combo
$name=(Get-WmiObject Win32_OperatingSystem).caption
 $bit=(Get-WmiObject Win32_OperatingSystem).OSArchitecture
 $ver=(Get-ItemProperty "HKLM:\SOFTWARE\Microsoft\Windows NT\CurrentVersion").ReleaseId
 Write-Host $name, $bit, $ver

# Get OS Version Function
Function Get-OSVersion {
Param($ComputerName)
    Invoke-Command -ComputerName $ComputerName -ScriptBlock {
        $all = @()
        (Get-Childitem c:\windows\system32) | ? Length | Foreach {

            $all += (Get-ItemProperty -Path $_.FullName).VersionInfo.Productversion
        }
        $version = [System.Environment]::OSVersion.Version
        $osversion = "$($version.major).0.$($version.build)"
        $minor = @()
        $all | ? {$_ -like "$osversion*"} | Foreach {
            $minor += [int]($_ -replace".*\.")
        }
        $minor = $minor | sort | Select -Last 1

        return "$osversion.$minor"
    }
}

# Another Solution
$WinVer = New-Object –TypeName PSObject
$WinVer | Add-Member –MemberType NoteProperty –Name Major –Value $(Get-ItemProperty -Path 'Registry::HKEY_LOCAL_MACHINE\Software\Microsoft\Windows NT\CurrentVersion' CurrentMajorVersionNumber).CurrentMajorVersionNumber
$WinVer | Add-Member –MemberType NoteProperty –Name Minor –Value $(Get-ItemProperty -Path 'Registry::HKEY_LOCAL_MACHINE\Software\Microsoft\Windows NT\CurrentVersion' CurrentMinorVersionNumber).CurrentMinorVersionNumber
$WinVer | Add-Member –MemberType NoteProperty –Name Build –Value $(Get-ItemProperty -Path 'Registry::HKEY_LOCAL_MACHINE\Software\Microsoft\Windows NT\CurrentVersion' CurrentBuild).CurrentBuild
$WinVer | Add-Member –MemberType NoteProperty –Name Revision –Value $(Get-ItemProperty -Path 'Registry::HKEY_LOCAL_MACHINE\Software\Microsoft\Windows NT\CurrentVersion' UBR).UBR
$WinVer

# Using Python
import platform
print(platform.system()) # returns 'Windows', 'Linux' etc.
print(platform.release()) # returns for Windows 10 or Server 2019 '10'
if platform.system() = 'Windows':
    print(platform.win32_ver()) # returns (10, 10.0.17744, SP0, Multiprocessor Free) on windows server 2019

# Another way
$OSVersion = [Version](Get-ItemProperty -Path "$($Env:Windir)\System32\hal.dll" -ErrorAction SilentlyContinue).VersionInfo.FileVersion.Split()[0]
$OSVersion.Major equals 10
$OSVersion.Minor equals 0
$OSVersion.Build equals 10586
$OSVersion.Revision equals 420

If ([Version]$OSVersion -ge [Version]"6.1")
   {
       #Do Something
   }