Logitech G170+ Keyboard not working

[Flawnex]

I recently posted a question about my GTAV giving me BSOD and someone told me it was because of some Comodo Antivirus driver it had left behind for months. I deleted the driver which fixed GTAV but now the only things on the keyboard that work are the lights, macrokeys and the volume scroll. I've reinstalled drivers, tried the keyboard on this laptop (it worked just fine) and I'm not sure what I can do now. Can someone help? Its a driver/software issue as the USB ports and the keyboard work in other conditions. Feel free to ask for any extra information, I want to get to play GTAV now that it works. I'd like to avoid reinstalling Windows 10, as it takes time and I currently have only 1 hard drive.

Full specs:
i5 7400
ASUS Z170-P D3
GTX 1050 Ti OC
1TB Seagate HDD
2x4GB Ballistix

 

[viveknayyar007]

Hello Flawnex

Can you please confirm if by 'reinstalling' you meant removing the driver, and then installing it from the start?

If so, can you please check if you obtained the driver from the vendor's official website?

You can also try this:

> Go to Device Manager and remove the driver.

> Restart the computer.

> Let Windows install the generic keyboard driver.

> Install the latest keyboard driver from the vendor's official site.

Please report back with the results for any further assistance.

Cheers!!

 

[Flawnex]

Hello Flawnex

Can you please confirm if by 'reinstalling' you meant removing the driver, and then installing it from the start?

If so, can you please check if you obtained the driver from the vendor's official website?

You can also try this:

> Go to Device Manager and remove the driver.

> Restart the computer.

> Let Windows install the generic keyboard driver.

> Install the latest keyboard driver from the vendor's official site.

Please report back with the results for any further assistance.

Cheers!!

I tried 2 ways, first I uninstalled the device and restarted my pc letting windows install some drivers. Then I tries the Logitech software as I couldn't find just a driver on its own and the software claimes to have installed my "new device". Also just remembered that in printers and devices manager there's a yellow warning sign on the keyboard and when I looked at it I got the error 39, which I did google but the Microsoft site I found wasn't very in depth.

 

[Flawnex]

UPDATE: I investigated more into the error code 39 which the driver update was giving me. I found this site: https://www.lifewire.com/how-to-fix-code-39-errors-2623185 which recommended me to delete some registry files (https://www.lifewire.com/how-to-delete-the-upperfilters-and-lowerfilters-registry-values-2619222) and I spotted something named "Upperfilter" which was referencing to cmdcss.sys (original cause of GTA5 crashing and the removal caused the keyboard to stop working) and I removed it. The keyboard still doesn't work but I think I'm getting closer. Here's the address of the registry I found Tietokone\HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\{4d36e96b-e325-11ce-bfc1-08002be10318}

Oh, and I'm using the virtual keyboard with my mouse, so I can do pretty much anything that isn't fullscreen on the pc.

UPDATE (I did it!): after restarting I realized that the key I deleted was propably not bad, just wrong, so I googled around a bit and found this site: https://answers.microsoft.com/en-us/windows/forum/windows8_1-hardware/keyboard-doesnt-work/3e5abbc9-8853-49ac-a3a1-64e3f98b3628. Basicly I learned from there that the UpperFilters should be set to kbdclass instead of deleted, so I created a new UpperFilters and set it to kbdclass and sure enough, the keyboard worked.

TLDR: Comodo antivirus left a wrong class UpperFilters key so I set it to kbdclass (from cmdcss.sys).