Dumb Question - New to Sophos - Please be gentle :)

I am an IT service provider and I've just picked up a group of laptops from which the client would like Sophos Endpoint Agent removed. I'm brand-new to Sophos. Programs & Features control panel says it's version 11.5.0. I've been able to disable tamper control, but when I try to uninstall it says that an update is in progress. I've left the box running for three days in order to allow the update to finish, but I still end up with the same message on attempted uninstall from Programs & Features. I found article 12360, which seems to give clear instructions, but in step 2 it states that I should be able to right-click on the Sophos icon on the system tray to see update status. Unfortunately I get nothing when attempting to right-click. It acts as if there's no right-click menu.

I have found article 109668 and I want to make sure that there's not a more elegant method to accomplish the uninstall before I start playing with .bat files and the Registry. I'd also like to verify that this article is proper for 11.5.0.

Thanks!

-Dan