A PowerShell script for deleting files (at logoff) from the Recycle Bin after X days of sitting in the bin.

DeleteOldRecycleBinFiles.ps1

# ----------------------------------------------------------------------- 
#
#       Author      : Baldwin D.
#       Description : Empty Recycle Bin with Retention (Logoff Script)
#       Source      : http://baldwin-ps.blogspot.be/2013/07/empty-recycle-bin-with-retention-time.html
#    
# -----------------------------------------------------------------------

$Global:Collection = @()

$Shell = New-Object -ComObject Shell.Application
$Global:Recycler = $Shell.NameSpace(0xa)

$csvfile = "\\YourNetworkShare\RecycleBin.txt"
$LogFailed = "\\YourNetworkShare\RecycleBinFailed.txt"


function Get-recyclebin
{ 
    [CmdletBinding()]
    Param
    (
        $RetentionTime = "7",
        [Switch]$DeleteItems
    )

    $User = $env:USERNAME
    $Computer = $env:COMPUTERNAME
    $DateRun = Get-Date

    foreach($item in $Recycler.Items())
    {
        $DeletedDate = $Recycler.GetDetailsOf($item,2) -replace "\u200f|\u200e","" #Invisible Unicode Characters
        $DeletedDate_datetime = get-date $DeletedDate  
        [Int]$DeletedDays = (New-TimeSpan -Start $DeletedDate_datetime -End $(Get-Date)).Days
     
        If($DeletedDays -ge $RetentionTime)
        {
            $Size = $Recycler.GetDetailsOf($item,3)
         
            $SizeArray = $Size -split " "
            $Decimal = $SizeArray[0] -replace ",","."
            If ($SizeArray[1] -contains "bytes") { $Size = [int]$Decimal /1024 }
            If ($SizeArray[1] -contains "KB") { $Size = [int]$Decimal }
            If ($SizeArray[1] -contains "MB") { $Size = [int]$Decimal * 1024 }
            If ($SizeArray[1] -contains "GB") { $Size = [int]$Decimal *1024 *1024 }
           
            $Object = New-Object Psobject -Property @{
                Computer = $computer
                User = $User
                DateRun = $DateRun
                Name = $item.Name
                Type = $item.Type
                SizeKb = $Size
                Path = $item.path
                "Deleted Date" = $DeletedDate_datetime
                "Deleted Days" = $DeletedDays }
           
            $Object

                If ($DeleteItems)
                {
                    Remove-Item -Path $item.Path -Confirm:$false -Force -Recurse
             
                    if ($?)
                    {
                        $Global:Collection += @($object)
                    }
                    else
                    {
                        Add-Content -Path $LogFailed -Value $error[0]
                    }
                }#EndIf $DeleteItems
            }#EndIf($DeletedDays -ge $RetentionTime)
        }#EndForeach item
}#EndFunction

Get-recyclebin -RetentionTime $RetentionTime -DeleteItems #Remove the comment if you wish to actually delete the content


if (@($collection).count -gt "0")
{
    $Collection = $Collection | Select-Object "Computer","User","DateRun","Name","Type","Path","SizeKb","Deleted Days","Deleted Date"
    $CsvData = $Collection | ConvertTo-Csv -NoTypeInformation
    $Null, $Data = $CsvData

    Add-Content -Path $csvfile -Value $Data
}

[System.Runtime.Interopservices.Marshal]::ReleaseComObject($shell)

#ScriptEnd

This code may require some adjusting. From a user comment on the source article page, I edited the code (line 78) for $RetentionTime so the variable only needs to be set once (at the top; it was set to 7 in both line 78 and line 23), but I'm not sure how variable scope works in PowerShell. If it's like other languages, the variable's value should be set outside of the function, not inside.