Okay I just needed to make sure this was the type of notification you are seeing. So these are actually new custom ads that we will be using moving forward. Note that you can click and drag these ads around the screen to any new position, which is where they will continue to appear.
That said, these ads should not be appearing unless you have system notifications disabled. Can anyone here check and confirm whether or not they have system notifications disabled in Windows (you can find this on the Notifications and actions page)?