BTW, on logitech.com, a tech says that we should not install any of the Logitech software. The default ones should be used. He also mentions that this is usually related to the bluetooth driver, which is, most of the time, outdated. But, where should we go to verify the bluetooth drivers? I checked the system and it was not obvious to see where to go.

BTW, a lot of people have experienced difficulties with those devices. Some of them have simply returned them and purchased Microsoft wireless devices instead.