I made a install script for Skype to do a Silent install.

UPDATED VERSION 2 With auto detect if Invoke-WebRequest exists

Improvements are welcome!

# Silent Install Skype
# https://www.skype.com/en/download-skype/skype-for-windows/

# Path for the workdir
$workdir = "c:\installer\"

# Check if work directory exists if not create it

If (Test-Path -Path $workdir -PathType Container)
{ Write-Host "$workdir already exists" -ForegroundColor Red}
ELSE
{ New-Item -Path $workdir  -ItemType directory }

# Download the installer

$source = "http://www.skype.com/go/getskype-full"
$destination = "$workdir\skype.exe"
Invoke-WebRequest $source -OutFile $destination

# Start the installation

Start-Process -FilePath "$workdir\skype.exe" -ArgumentList "/VERYSILENT /SP- /NOCANCEL /NORESTART /SUPPRESSMSGBOXES /NOLAUNCH"

# Wait XX Seconds for the installation to finish

Start-Sleep -s 60

# Remove the installer

rm -Force $workdir\skype*

For Windows 7 please change 

$source = "http://www.skype.com/go/getskype-full"
$destination = "$workdir\skype.exe"
Invoke-WebRequest $source -OutFile $destination

To

$WebClient = New-Object System.Net.WebClient
$WebClient.DownloadFile("http://www.skype.com/go/getskype-full","$workdir\skype.exe")

Since Powershell in Windows 7 does not support the Invoke-WebRequest

Version 2

This version will check if the Invoke-WebRequest Command exists or not. For legacy Systems like Windows 7 you than only have one Script and don't need to change things in Pulseway

# Silent Install Skype
# https://www.skype.com/en/download-skype/skype-for-windows/

# Path for the workdir
$workdir = "c:\installer\"

# Check if work directory exists if not create it

If (Test-Path -Path $workdir -PathType Container)
{ Write-Host "$workdir already exists" -ForegroundColor Red}
ELSE
{ New-Item -Path $workdir  -ItemType directory }

# Download the installer

$source = "http://www.skype.com/go/getskype-full"
$destination = "$workdir\skype.exe"

# Check if Invoke-Webrequest exists otherwise execute WebClient

if (Get-Command 'Invoke-Webrequest')
{
     Invoke-WebRequest $source -OutFile $destination
}
else
{
    $WebClient = New-Object System.Net.WebClient
    $webclient.DownloadFile($source, $destination)
}

# Start the installation

Start-Process -FilePath "$workdir\skype.exe" -ArgumentList "/VERYSILENT /SP- /NOCANCEL /NORESTART /SUPPRESSMSGBOXES /NOLAUNCH"

# Wait XX Seconds for the installation to finish

Start-Sleep -s 60

# Remove the installer

rm -Force $workdir\skype*