How to make Lenovo Thinkpad pop-up notifications work?

Question

Notifications

There is a Lenovo Thinkpad L520 and Windows 7 x64. There are drivers on the manufacturer's website, but there are several types of them with the same names for the same OS version. I did not bother and installed everything through the Lenovo proprietary installer. But no matter how much I fought, notifications about changes in brightness and sound through the Fn keys do not pop up, and the brightness itself and the sound level change as expected. In what sequence dances with a tambourine are needed, I did not understand. And in the last installation, notifications appeared. Notifications about the inclusion of capslock, namlock on the spot. But with brightness and sound trouble. I would never have thought that there would be such jambs on the Lenovo Thinkpad.