Try {

    $Keys=Get-ChildItem HKCR:Installer -Recurse -ErrorAction Stop | Get-ItemProperty -name ProductName -ErrorAction SilentlyContinue

}

Catch {
    New-PSDrive -Name HKCR -PSProvider registry -Root HKEY_CLASSES_ROOT -ErrorAction SilentlyContinue | Out-Null
    $Keys=Get-ChildItem HKCR:Installer -Recurse | Get-ItemProperty -name ProductName -ErrorAction SilentlyContinue
    }

Finally {
    foreach ($Key in $Keys) {

        if ($Key.ProductName -like "*Flash*Plugin") {

            Remove-Item $Key.PSPath -Force -Recurse

        }
     }

}