The HP Pavilion Chromebook comes with a unique Chrome App named plainly "@HP" which aims to register the Chrome OS device
. That's pretty much it.
If you uninstalled it by mistake, you can re-add it by going to the Chrome Web Store athttps://chrome.google.com/webstore/detail/hp/plamffmopddapimaopfdbibfkjpbojbf
If you still have it, right click on it in the App Launcher and click "Remove from Chrome".