Get notified when your computer reboots using Pushover

Pushover is a platform for sending and receiving push notifications to mobile devices (Android and iOS). Pushover is free, but requires the installation of a paid app on your Android or iOS device. After you set up your account on Pushover you get a user token that is used to identify you as the sender of a notification.
To send notifications, create a new application on the Pushover site. Give it a name, select type and upload an icon. After the application is registered you get an application token that identifies your application.

OK, so I wanted a notification sent to my phone whenever my computer restarted. Since it's a Windows 8 computer I decided to go for PowerShell 3.0 and created the following script:

$uri = "https://api.pushover.net/1/messages.json"
$parameters = @{
  token = "<app token>"
  user = "<user token>"
  title = "Reboot"
  message = "Your computer just rebooted"
}
$parameters | Invoke-RestMethod -Uri $uri -Method Post

Nothing special about the script, basically it's a slight modification of an example script found on the Pushover FAQ. Just replace <app token> and <user token> with your own tokens.

Next, I need to have the script run when the computer starts, and run before anyone logs on. That's the point, right, if I'm at the computer I don't need a notification telling me the computer restarted.
Run the Local Group Policy Editor (gpedit.msc) tool as administrator and drill down to Local Computer Policy -> Computer Configuration -> Windows Settings -> Scripts and open Startup.

Go to the PowerShell Scripts tab and click Add. Click Browse next to Script Name and locate your script. Click OK, OK and then close the policy editor.

All done!