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

UPDATED VERSION 2 With auto detect if Invoke-WebRequest exists

Improvements are welcome!

Change the version if needed in the Source URL: https://www.dropbox.com/downloading?full=1&os=win

# Silent Install Dropbox 
# Download URL: https://www.dropbox.com/downloading?full=1&os=win

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

# 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 = "https://www.dropbox.com/download?full=1&plat=win"
$destination = "$workdir\dropbox.exe"
Invoke-WebRequest $source -OutFile $destination

# Start the installation

Start-Process -FilePath "$workdir\dropbox.exe" -ArgumentList "/S"

# Wait XX Seconds for the installation to finish

Start-Sleep -s 60

# Remove the installer

rm -Force $workdir\dropbox*

For Windows 7 please change 

$source = "https://www.dropbox.com/download?full=1&plat=win"
$destination = "$workdir\dropbox.exe"
Invoke-WebRequest $source -OutFile $destination

To

$WebClient = New-Object System.Net.WebClient
$WebClient.DownloadFile("https://www.dropbox.com/download?full=1&plat=win","$workdir\dropbox.exe")

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

Please let the user Log Off and On again after the installation of dropbox, then Dropbox wil auto start.

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 Dropbox 
# Download URL: https://www.dropbox.com/downloading?full=1&os=win

# 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 = "hhttps://www.dropbox.com/download?full=1&plat=win"
$destination = "$workdir\dropbox.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\dropbox.exe" -ArgumentList "/S"

# Wait XX Seconds for the installation to finish

Start-Sleep -s 60

# Remove the installer

rm -Force $workdir\dropbox*

Please let the user Log Off and On again after the installation of dropbox, then Dropbox wil auto start.

Is there something I can add to the script to also automatically sign in an account?