PowerShell Function to Fix System Path by removing duplicates

Fix-SystemPath

Function Fix-SystemPath {
<#
    .SYNOPSIS
    Fixes System Path
    
    .DESCRIPTION
    Removes duplicates from System Path
#>
    [CMDLETBINDING(SupportsShouldProcess)]
    param(
    $OutputFile=$("${env:TEMP}\${env:ComputerName}_FixedPath.csv")
)
    
    $EnvVarRegPath = 'HKLM:\System\currentcontrolset\control\session manager\environment\'
    $CurrentPath = (Get-ItemProperty -Path $EnvVarRegPath -Name Path).path
    # Following would work but would also change the order of path; not ideal!
    #$FixedPath=($CurrentPath -split ';' |where {$_ -ne ''} |sort -Unique) -join ';'

    # We will keep the order as is!
    $arr=@()

    $CurrentPath -split ';' |where {$_ -ne ''} | % {
        if (!$arr.Contains($_)) {
            $arr += $_
        }
    }
    
    $FixedPath = $arr -join ';'
    $PathFixed=$false
    $NeedFix=$false

    If ($CurrentPath.Length -gt $FixedPath.Length  ) {
        $NeedFix=$true
        Try 
        { 
            If ($PSCMDLET.ShouldProcess($env:ComputerName,'Update System Path')){
                Write-Verbose "Updating System Path"
                Set-ItemProperty $EnvVarRegPath -Name Path -Value $FixedPath -PassThru -Force          
                $PathFixed=$true
            }
        }
        catch 
        {
            $PathFixed=$false
        }
   } 

    $result = [PSCustomObject]@{ComputerName=$env:COMPUTERNAME;NeedFix=$NeedFix; IsFixed=$PathFixed;PathSizeCurrent=$($CurrentPath.Length);PathSizeFixed=$($FixedPath.Length);PathBefore=$CurrentPath;PathAfter=$FixedPath}     
    $result | export-csv -NoTypeInformation -Path $outputFile -Force

}