If your K120 isn’t working, it’s almost never a driver issue. Try these instead:
Plug the K120 back in. Windows will automatically reinstall the driver for you. Troubleshooting Common K120 Issues logitech k120 keyboard driver
The Logitech K120 is a workhorse that thrives on simplicity. You don't need to scour the internet for a specific .exe file to get it running. Stick to the built-in Windows drivers, keep your OS updated, and your K120 should last for years to come. If your K120 isn’t working, it’s almost never
If you're looking for precise features related to the K120, consider checking: If your K120 isn’t working