Noticed that Windows 7 devices (with the extended support update) weren’t showing software inventory in Automox. After working with Automox support, they discovered that Windows 7 devices need Powershell 5 (supposedly they’ll have a fix for Windows 7 devices soon). I attempted to use the Microsoft provided powershell script to install Windows Management Framework 5.1 (KB3191566) (which installs powershell 5 on Windows 7), but couldn’t get it to run consistently. Tried installing chocolatey and then running ‘choco install powershell’ and it worked consistently.

So that’s what this script does: installs chocolatey offline and then runs ‘choco install powershell’ on Windows 7 machines. It isn’t pretty, but it works. Would appreciate someone with actual Powershell experience/skills to clean up.

Evaluation

if ($PSVersionTable -and ($PSVersionTable.PSVersion -ge bVersion]$ThisPackagePSHVersion)) {


	    Write-Warning "PowerShell version, $($PSVersionTable.PSVersion), is already installed."


        exit 0


	}


    else {


        # Powershell 5.1 is not installed, run remediation script


        exit 1


        }

Remediation

# Modified from Chocolatey Offline installation. 


# https://chocolatey.org/docs/how-to-setup-offline-installation


# This script installs Chocolatey and then runs the Windows  


# Management Framework 5.1 installation in order to install 


# Powershell 5.1 on Windows 7 devices. Could not get the MS provided 


# powershell script for KB3191566 to work consistently 


# (hangs, high memory usage, etc);but 'choco install powershell' 


# seemed to work consistently.





# Tried just using bypass, but unrestricted allowed consistent usage. 


# Reset to restricted at the end


Set-ExecutionPolicy Unrestricted;


Set-ExecutionPolicy Bypass -Scope Process -Force;





# Set variables


$localPath = $ExecutionContext.SessionState.Path.GetUnresolvedProviderPathFromPSPath('.\')


$package ='chocolatey.0.10.15.nupkg'


$localChocolateyPackageFilePath = Join-Path $localPath $package


$ChocoInstallPath = "$($env:SystemDrive)\ProgramData\Chocolatey\bin"


$unzipMethod = "7zip"


$7zP = $ExecutionContext.SessionState.Path.GetUnresolvedProviderPathFromPSPath('.\')


$7z = "7za.exe"


$7zipUrl = 'https://chocolatey.org/7za.exe'


$7zlocalPath = Join-Path $7zP $7z





# Need to download 7za.exe and the current version of Chocolatey and add as installation files


function Install-ChocolateyFromPackage {


  $env:ChocolateyInstall = "$($env:SystemDrive)\ProgramData\Chocolatey"


  $env:Path += ";$ChocoInstallPath"


  $chocolateyPackageFilePath = Join-Path $localPath $package





  if ($chocolateyPackageFilePath -eq $null -or $chocolateyPackageFilePath -eq '') {


    throw "You must specify a local package to run the local install."


  }





  if (!(Test-Path($chocolateyPackageFilePath))) {


    throw "No file exists at $chocolateyPackageFilePath"


  }





  $chocTempDir = Join-Path $env:TEMP "chocolatey"


  $tempDir = Join-Path $chocTempDir "chocInstall"


  if (!rSystem.IO.Directory]::Exists($tempDir)) {xSystem.IO.Directory]::CreateDirectory($tempDir)}


  $file = Join-Path $tempDir "chocolatey.zip"


  Copy-Item $chocolateyPackageFilePath $file -Force


  


  


  # unzip the package


  Write-Output "Extracting $file to $tempDir..."


  $7zaExe = Join-Path $tempDir "7za.exe"


  


    $params = "x -o`"$tempDir`" -bd -y `"$file`""


    # use more robust Process as compared to Start-Process -Wait (which doesn't


    # wait for the process to finish in PowerShell v3)


    $process = New-Object System.Diagnostics.Process


    $process.StartInfo = New-Object System.Diagnostics.ProcessStartInfo($7zlocalPath, $params)


    $process.StartInfo.RedirectStandardOutput = $true


    $process.StartInfo.UseShellExecute = $false


    $process.StartInfo.WindowStyle = nSystem.Diagnostics.ProcessWindowStyle]::Hidden


    $process.Start() | Out-Null


    $process.BeginOutputReadLine()


    $process.WaitForExit()


    $exitCode = $process.ExitCode


    $process.Dispose()





    $errorMessage = "Unable to unzip package using 7zip. Perhaps try setting `$env:chocolateyUseWindowsCompression = 'true' and call install again. Error:"


    switch ($exitCode) {


      0 { break }


      1 { throw "$errorMessage Some files could not be extracted" }


      2 { throw "$errorMessage 7-Zip encountered a fatal error while extracting the files" }


      7 { throw "$errorMessage 7-Zip command line error" }


      8 { throw "$errorMessage 7-Zip out of memory" }


      255 { throw "$errorMessage Extraction cancelled by the user" }


      default { throw "$errorMessage 7-Zip signalled an unknown error (code $exitCode)" }


    }


   


  


  # Call Chocolatey install


  Write-Output 'Installing chocolatey on this machine'


  $toolsFolder = Join-Path $tempDir "tools"


  $chocInstallPS1 = Join-Path $toolsFolder "chocolateyInstall.ps1"





  & $chocInstallPS1





  Write-Output 'Ensuring chocolatey commands are on the path'


  $chocInstallVariableName = 'ChocolateyInstall'


  $chocoPath = /Environment]::GetEnvironmentVariable($chocInstallVariableName)


  if ($chocoPath -eq $null -or $chocoPath -eq '') {


    $chocoPath = 'C:\ProgramData\Chocolatey'


  }





  $chocoExePath = Join-Path $chocoPath 'bin'





  if ($($env:Path).ToLower().Contains($($chocoExePath).ToLower()) -eq $false) {


    $env:Path = >Environment]::GetEnvironmentVariable('Path',nSystem.EnvironmentVariableTarget]::Machine);


  }





  Write-Output 'Ensuring chocolatey.nupkg is in the lib folder'


  $chocoPkgDir = Join-Path $chocoPath 'lib\chocolatey'


  $nupkg = Join-Path $chocoPkgDir 'chocolatey.nupkg'


  if (!(Test-Path $nupkg)) {


    Write-Output 'Copying chocolatey.nupkg is in the lib folder'


    if (!/System.IO.Directory]::Exists($chocoPkgDir)) { (System.IO.Directory]::CreateDirectory($chocoPkgDir); }


    Copy-Item "$file" "$nupkg" -Force -ErrorAction SilentlyContinue


  }





  # running choco install powershell


  Write-Output 'Installing Powershell via Chocolatey'


  $env:ChocolateyInstall = "$($env:SystemDrive)\ProgramData\Chocolatey"


  $env:Path += ";$ChocoInstallPath"


  & C:\ProgramData\chocolatey\bin\choco.exe install powershell -y | out-null





  # reset execution policy to restricted


  Write-Output 'Resetting execution policy to restricted'


  Set-ExecutionPolicy Restricted


}





# Install Chocolatey


Install-ChocolateyFromPackage $localChocolateyPackageFilePath