Finding Version of IIS using powershell - iis

Question

I wish to find the version of IIS using a powershell (or WMI) query.
The following is the query which I have used.
Get-WmiObject -namespace "root\microsoftiisv2" -query "select MajorIIsVersionNumber from IISWebInfo"
I tested this query using powershell console in a 'Windows 8' PC with 'IIS 8'. But the result is 7 , where the expected version Number is 8.
Can someone help me to solve this issue?.

Answer 1

You can try:
get-itemproperty HKLM:\SOFTWARE\Microsoft\InetStp\ | select setupstring,versionstring

Answer 2

Even though the thread is little old,this is the link I landed first. So letting you know what I found.
The below command helped me find the IIS version correctly on IIS 8.5 (Windows 2012 R2) and 7.5 Windows 7 SP1.
[System.Diagnostics.FileVersionInfo]::GetVersionInfo("$env:SystemRoot\system32\inetsrv\InetMgr.exe").ProductVersion
Reference:
https://forums.iis.net/p/1171695/1984536.aspx : Answer from f00_beard

Answer 3

If you want the decimal value for order comparison.
$iisInfo = Get-ItemProperty HKLM:\SOFTWARE\Microsoft\InetStp\
$version = [decimal]"$($iisInfo.MajorVersion).$($iisInfo.MinorVersion)"

Answer 4

Here's a little ScriptBlock function that I created based on the answer from #C.B. to get the IIS Version from a remote computer.
$pwd = convertto-securestring "yourstrongpasswordhere" -asplaintext -force
$cred=new-object -typename System.Management.Automation.PSCredential -argumentlist "machinenamehere\adminusernamehere",$pwd
$iisversion= Invoke-Command -ComputerName $machineName -ScriptBlock {
$(get-itemproperty HKLM:\SOFTWARE\Microsoft\InetStp\).setupstring
} -Credential $cred
Write-Host iisversion = $iisversion
If($iisversion -like '*IIS 6*'){
Write-Host This server uses IIS6
}
If($iisversion -like '*IIS 7*'){
Write-Host This server uses IIS7
}

Answer 5

For purely the version, I prefer checking the info on the w3wp executable.
Per the "how-to" article from MSFT:
If(Test-Path $w3wpPath) {
$productProperty = Get-ItemProperty -Path $w3wpPath
Write-Host $productProperty.VersionInfo.ProductVersion
}
Else {
Write-Host "Not find IIS."
}