I don't use Lighroom mobile, but as far as I know, it's only for iOs and Android, and I don't think it can be installed on a PC or a Mac.
Can you post a screenshot of the Lightroom window on your laptop?
Here is a photo of LR5 on my laptop.
You have the regular version of Lightroom, not the mobile version.
Ignore "Get started with Lightroom mobile", you would only click that if you wanted to use mobile in addition to the regular version.
I think there might be an option to hide the message if you click it.
To get started, click the Import button in the bottom left corner.
Ahh ok gr8, I was pulling my hair out, not that I have any as I'm bald ha. Thank you for your time