How to know if powershell is installed on remote workstation?

check if file exist ?

$path= "\\remote\C$\windows\System32\WindowsPowerShell\v1.0\powershell.exe"if(test-path $path){(ls $path).VersionInfo}

You could use a batch-script that you run manually or try using GPO(as a startup script). It will save a file my-computer-name.txt with "false" if powershell wasn't found or the PS-version(1.0 or 2.0) if PS is installed. Then you'd just read the files.

pscheck.bat

@echo offFOR /F "tokens=3" %%A IN ('REG QUERY "HKLM\SOFTWARE\Microsoft\PowerShell\1" /v Install ^| FIND "Install"') DO SET PowerShellInstalled=%%AIF NOT "%PowerShellInstalled%"=="0x1" (echo false > \\remote\location\%COMPUTERNAME%.txtGOTO end)FOR /F "tokens=3" %%A IN ('REG QUERY "HKLM\SOFTWARE\Microsoft\PowerShell\1\PowerShellEngine" /v PowerShellVersion ^| FIND "PowerShellVersion"') DO SET PowerShellVersion=%%Aecho %PowerShellVersion% > \\remote\location\%COMPUTERNAME%.txt:end

The PSversion value for 3.0 in the registry is in another key(...\PowerShell\3\PowerShellEngine), but I'm gussing PS3.0 is not necessary to know since it's so new and all PS scripts work with PS 2.0.

Update: Powershell version

function Check-PS {    [CmdletBinding()]    param (        [Parameter(ValueFromPipeline=$true)]        [String[]]$ComputerName = $env:COMPUTERNAME    )    Process    {        foreach ($computer in $ComputerName)         {            $path = "\\$computer\C$\Windows\System32\WindowsPowerShell\v1.0\powershell.exe"            $exists = $false            #Check if exists            if(Test-Path $path){                $exists = $true                #Detect version                switch -Wildcard ((Get-ChildItem $path).VersionInfo.ProductVersion)                {                    "6.0*" { $ver = 1 }                    "6.1*" { $ver = 2 }                    "6.2*" { $ver = 3 }                    default { $ver = 0 }                }            } else {                Write-Error "Failed to connect to $computer"                $ver = -1            }            #Return object            New-Object pscustomobject -Property @{                Computer = $computer                HasPowerShell = $exists                Version = $ver            }        }    }}

It supports mulitple computernames and input via pipeline.

Check-PS -ComputerName "Computer1", "Computer2"

Or

"Computer1", "Computer2" | Check-PS

Test with localcomputer(default computername):

PS > Check-PSHasPowerShell Computer Version------------- -------- -------         True FRODE-PC       3