Enable/Disable Microsoft Lync (per user)

LyncToggle.ps1

<# 
.SYNOPSIS 
    Enable/Disable Microsoft Lync
.DESCRIPTION 
    Enable/Disable Microsoft Lync's "Auto Run When Logon To Windows" and "Auto Open Main Window When Startup".
.NOTES 
    Author        : Travis Beck
    Last Modified : 2014/05/01
#>

param (
    [switch]$enable = $false,
    [switch]$disable = $false
)

$path = "HKCU:\Software\Microsoft\Communicator"

if ($enable) {
    Write-Host "Enabling Lync on Startup"
    $value = 1 #Enable
} else {
    $value = 0 #Disable
    Write-Host "Disabling Lync on Startup"
}

Set-ItemProperty -Path $path -Name AutoRunWhenLogonToWindows -Value $value -Type DWord
Set-ItemProperty -Path $path -Name AutoOpenMainWindowWhenStartup -Value $value -Type DWord

if ($enable) {
    Write-Host "Starting Lync..."
    & 'C:\Program Files (x86)\Microsoft Lync\communicator.exe'
}

if ($disable) {
    #Kill Lync if active
    $ProcessActive = Get-Process communicator -ErrorAction SilentlyContinue
    if ( $ProcessActive -ne $null ) {
       Write-Host "Stopping Communicator Process"
       Stop-Process -processname communicator
    }

    #Kill Lync Splash Screen
    $ProcessActive = Get-Process sllauncher -ErrorAction SilentlyContinue
    if ( $ProcessActive -ne $null ) {
        Write-Host "Stopping Lync Splash Screen (sllauncher)"
        Stop-Process -processname sllauncher
    }
}