Agent uninstallation restriction

$service = Get-Service amagent

IF($service.Status -ne 'Running'){exit 1}

function Stop-ServiceWithTimeout ([string] $name, [int] $timeoutSeconds) {
        $timespan = New-Object -TypeName System.Timespan -ArgumentList 0,0,$timeoutSeconds
        $svc = Get-Service -Name $name
        if ($svc -eq $null) { return $false }
        if ($svc.Status -eq [ServiceProcess.ServiceControllerStatus]::Stopped) { return $true }
        $svc.Stop()
        try {
            $svc.WaitForStatus([ServiceProcess.ServiceControllerStatus]::Stopped, $timespan)
        }
        catch [ServiceProcess.TimeoutException] {
            Write-Verbose "Timeout stopping service $($svc.Name)"
            return $false
        }
        return $true
}

$service = Get-Service amagent

IF($service.Status -ne 'Running'){
    Write-Output "Detected Automox amagent service running. Stopping service"
    $try = Stop-ServiceWithTimeOut -name amagent -timeoutSeconds 10 -verbose
    $status = Get-WmiObject win32_service | where name -eq amagent
    IF($status.State -ne "stopped")
    {
        taskkill /PID $status.ProcessId /F
    }
    $service = Get-Service amagent
    IF($service.Status -eq 'Stopped'){Write-Output "Service stopped successfully."}
    Write-Output "Starting amagent service"
    Start-Service amagent -Verbose
}else{
    Write-Output "Automox status was $($service.Status). Restarting anyway"
    Restart-Service amagent -Verbose
}

# Check if already installed
$unkeys = "HKLM:\Software\Microsoft\Windows\CurrentVersion\Uninstall"
foreach ($key in Get-ChildItem $unkeys -ErrorAction SilentlyContinue | Get-ItemProperty | Where-Object { ($_.DisplayName -like "*Automox*" -and $_.DisplayVersion) })
{
        Write-Output "Automox Agent is already installed"
        $i++
}
$un64keys = "HKLM:\Software\Wow6432Node\Microsoft\Windows\CurrentVersion\Uninstall"
foreach ($key in Get-ChildItem $un64keys -ErrorAction SilentlyContinue | Get-ItemProperty | Where-Object { ($_.DisplayName -like "*Automox*" -and $_.DisplayVersion) })
{
        Write-Output "Automox Agent is already installed"
        $i++
}
IF($i -gt 0){exit 0}else{exit 1}

# Access Key
$accesskey = '0000000000000000000000'
# Install
$TLS12Protocol = [System.Net.SecurityProtocolType] 'Ssl3 , Tls12'
[System.Net.ServicePointManager]::SecurityProtocol = $TLS12Protocol
$source = 'https://console.automox.com/installers/Automox_Installer-latest.msi'
$destination = 'C:\Automox_Installer-latest.msi'
$client = (New-Object Net.WebClient)
$client.DownloadFile($source, $destination)
Start-Process msiexec.exe -ArgumentList "/i $destination /qn /norestart ACCESSKEY=$accesskey" -Wait
del $destination

# Check if install worked
$unkeys = "HKLM:\Software\Microsoft\Windows\CurrentVersion\Uninstall"
foreach ($key in Get-ChildItem $unkeys -ErrorAction SilentlyContinue | Get-ItemProperty | Where-Object { ($_.DisplayName -like "*Automox*" -and $_.DisplayVersion) })
{
        $installed++
}
$un64keys = "HKLM:\Software\Wow6432Node\Microsoft\Windows\CurrentVersion\Uninstall"
foreach ($key in Get-ChildItem $un64keys -ErrorAction SilentlyContinue | Get-ItemProperty | Where-Object { ($_.DisplayName -like "*Automox*" -and $_.DisplayVersion) })
{
        $installed++
}

IF($installed -gt 0)
{
    Write-Output "Automox Agent installed Succesfully"
    exit 0
}else{
    exit 1
}