Lenovo / G50-30 - Windows 10 - The keyboard at the login window does not work

Hello.
I have had a problem with Windows 10 for some time, I will add that everything was OK before, so the keyboard at the login window from the system does not work for me, in the place where I have to enter the password. Currently, I do so that I take out the on-screen keyboard and enter the password from it. After logging in, the keyboard starts immediately. I would like to add that after turning on the laptop, the keyboard works until the Windows login screen appears, it looks like something is blocking the keyboard only for the duration of logging in. Does anyone know what the problem could be?
best regards

Welcome. Considering that you know what you have installed and we don't, you are more likely to guess.

Download FRST -> https://www.bleepingcomputer.com/download/farbar-recovery-scan-tool/
Perform a scan on the default settings, attach two generated text files, maybe you can see the source of the problem there.

Also check the registry for the key: HKEY_LOCAL_MACHINE \ SYSTEM \ CurrentControlSet \ Control \ Class \ {4D36E96B-E325-11CE-BFC1-08002BE10318} - specifically, whether UpperFilters and LowerFilters are there. If so, give their values.

Welcome back. Attached I am attaching FRST files and registry. I also noticed that after pressing shift, alt, capslock, ctrl and other functional speakers, sounds like dosa come out from the speakers. Will try to reinstall the keyboard drivers. But if you can, have a look at the attached files.

Now I noticed that at the login window, if I press the buttons for about 3 seconds, I can enter the password. But I have to keep every letter / number of passwords for 3 seconds, where after logging in and in front of the login window, the keyboard reacts immediately.

In the registry you are to expand this key and then check it.

Uninstall Comodo and check if the problem persists. Make sure to create a system restore point beforehand, other problems may arise after uninstalling Comodo.

Already resolved, and the hint for me was that when I held down the key for 3 seconds. the letters jumped in. The FILTER KEYS were turned on, but not in Windows because they were turned off there, only in the login window in the lower right corner you have to click on such a circle with arrows and there is a slider with filter keys that must be turned off. Seemingly banal, but it caused such a problem: