You said you updated the driver, how exactly? We’ve seen people get around these issues with a little trial and error, so I’m wondering if there’s a method you haven’t tried yet (ie, going via the Intel site vs going via the Lenovo site, manual driver update vs automatic, etc).
Most of our team runs Android phones, but I think it’s safe to say that general consensus is that iPads make the best tablet remotes. If you don’t need audio from the tablet in your media room, that would be my recommendation.