Since uninstalling the keyboard driver only helps temporarily, and Fast Startup, driver updates, and BIOS updates were already tried, the next useful split is software-behavior checks versus hardware confirmation.
- Check Accessibility keyboard settings
- In Windows 11, go to Settings > Accessibility > Keyboard.
- Turn off Sticky Keys, Filter Keys, and Toggle Keys if any are enabled.
- Filter Keys in particular can cause ignored or repeated keystrokes.
- Check keyboard layout / input language
- Go to Settings > Time & language > Region & language.
- Make sure the keyboard input language matches the display language.
- If the wrong layout is active, some keys can produce unexpected characters.
- Clean the keyboard
- Inspect the affected key areas for dust or debris.
- Use compressed air to blow debris from the surface and between the keys, or gently vacuum the top of the keyboard with a dusting brush.
- This is especially relevant when specific key groups are unreliable rather than the whole keyboard failing equally.
- Test whether this is hardware
- If the built-in keyboard is still unreliable, test the device behavior as a hardware issue indicator:
- The On-Screen Keyboard working shows Windows input is still available.
- If a keyboard has keys that are damaged, cracked, fallen off, or continues to repeat/drop keys after cleaning, that points to hardware failure.
- Microsoft guidance for repeated or dropped keys is that if cleaning does not resolve it, the keyboard is likely experiencing hardware failure and needs service.
- If the built-in keyboard is still unreliable, test the device behavior as a hardware issue indicator:
- Use the On-Screen Keyboard while testing
- To keep using the PC, turn on the On-Screen Keyboard from Settings > Ease of Access > Keyboard, or press Windows logo key + Ctrl + O.
Based on the pattern described—specific physical key ranges failing, temporary recovery after driver removal, and no lasting improvement after Fast Startup, driver, and BIOS work—the strongest next step is to treat this as likely hardware-related unless cleaning and keyboard settings immediately change the behavior. If the keys continue to drop or fail after that, the practical fix is service or keyboard replacement.
- Troubleshoot Surface Pro Keyboard or Type Cover
- Troubleshoot problems with your Surface mouse or keyboard
- Make your mouse, keyboard, and other input devices easier to use
- the media/function keys on your Dell Inspiron 15 7000 are not working correctly—either performing the wrong action or not responding as expected. - Microsoft Q&A