Reset-Slack.ps1

if ((Get-Process -Name slack -ErrorAction SilentlyContinue) -ne $null) { 
    $totalMemory = gwmi Win32_OperatingSystem | select -ExpandProperty TotalVisibleMemorySize
    $slackMemory = (get-process slack | measure -Sum WS | select -ExpandProperty Sum) / 1024
    $slackExecutable = (Get-Process -Name slack | select -First 1).path

    if (($slackMemory / $totalMemory) -ge .1) {
        Get-Process slack | Stop-Process 
        Start-Process $slackExecutable
    }
}