Lenovo ThinkPad X13 AMD Fingerprint Not Enrolling Windows 11

The HP Pavilion 15 keyboard not working on Windows 11 is caused by a stuck key registering continuously, the HID keyboard driver being corrupted, or a hardware filter driver blocking keyboard input. I have resolved this on multiple HP Pavilion 15 units where the keyboard stopped responding entirely after a Windows 11 update, and reinstalling the keyboard driver through Device Manager plus a BIOS reset restored full keyboard function.

Why HP Pavilion 15 Keyboard Is Not Working

HID Keyboard Driver Corrupted

The keyboard uses the standard HID (Human Interface Device) keyboard driver in Windows. If this driver becomes corrupted during a Windows update or failed driver install, the keyboard stops receiving input. Device Manager shows the keyboard under Keyboards as Standard PS/2 Keyboard or HID Keyboard Device. A yellow warning icon indicates the driver issue.

Filter Driver Blocking Keyboard Input

Third-party software such as accessibility tools, keyboard remappers, or security applications install keyboard filter drivers that sit between the hardware and Windows. If one of these filter drivers becomes corrupted or incompatible, all keyboard input is blocked. The registry key for keyboard class filters is at:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\{4D36E96B-E325-11CE-BFC1-08002BE10318}

If you see unexpected entries in UpperFilters or LowerFilters values, these third-party filters may be the cause.

Fn Lock or Sticky Keys Causing Abnormal Behaviour

The keyboard may be working but in an unexpected mode. Fn Lock (if accidentally enabled) changes the function of the top row keys. Sticky Keys or Filter Keys accessibility features can make the keyboard seem unresponsive by requiring longer key press durations. Press the Fn key five times quickly to enable Sticky Keys and then disable it in Settings, Accessibility.

Fix 1 – Reinstall HID Keyboard Driver

1. Open Device Manager with Win + X, Device Manager.
2. Expand Keyboards.
3. Right-click Standard PS/2 Keyboard or HID Keyboard Device and select Uninstall device.
4. In Device Manager, click Action, Scan for hardware changes.
5. Windows reinstalls the keyboard driver automatically.
6. Test the keyboard immediately after the driver reinstall.

Fix 2 – Disable Filter Keys and Sticky Keys

1. Go to Settings, Accessibility, Keyboard.
2. Toggle off Sticky Keys if it is enabled.
3. Toggle off Filter Keys if it is enabled.
4. Also toggle off Toggle Keys.
5. Test the keyboard after disabling all three accessibility keyboard features.

Fix 3 – Clear Keyboard Filter Drivers from Registry

1. Open Registry Editor (Win + R, regedit) as Administrator.
2. Navigate to: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\{4D36E96B-E325-11CE-BFC1-08002BE10318}
3. In the right pane, check for UpperFilters or LowerFilters values.
4. If present, right-click and export the key as a backup first.
5. Then delete the UpperFilters and LowerFilters values.
6. Restart the laptop and test the keyboard.

Per Rashidah Osman, who is a secondary school teacher using an HP Pavilion 15 for lesson planning, the keyboard stopped working after a Windows 11 update installed a filter driver conflict – clearing the UpperFilters registry value and restarting restored full keyboard operation within five minutes.

Fix 4 – Test with On-Screen Keyboard

If the physical keyboard is completely unresponsive, use the On-Screen Keyboard to perform fixes:

1. Click Start, Accessibility, On-Screen Keyboard.
2. Or press Windows key with a mouse click, type osk and press Enter on-screen.
3. Use the on-screen keyboard to navigate Settings and Device Manager to perform the driver reinstall above.

If the on-screen keyboard works but the physical keyboard does not, the issue is hardware or driver. See HP’s keyboard troubleshooting guide for further hardware diagnosis steps specific to Pavilion laptops.

Frequently Asked Questions

Why does HP Pavilion 15 keyboard type wrong characters?

Wrong characters usually indicate the keyboard language or input method is set incorrectly. Go to Settings, Time and language, Language and region, and verify the correct keyboard layout is set as the default input method.

Why does HP Pavilion 15 keyboard stop working after sleep?

Power management may be suspending the keyboard controller during sleep. Uninstall and rescan for the keyboard driver in Device Manager to reset the power management state. Also check Device Manager for the keyboard device power management tab and uncheck Allow computer to turn off this device to save power if available.

How do I reset HP Pavilion 15 keyboard to factory settings?

Remove the HP Pavilion 15 power cable and battery (if removable), then hold the power button for 30 seconds to discharge residual power. This resets the embedded controller which manages the keyboard hardware. Reconnect power and restart to test the keyboard.

Can I replace the keyboard on HP Pavilion 15?

Yes. The HP Pavilion 15 keyboard is a replaceable module on most models. Replacement keyboards are available from HP parts or third-party suppliers. If the keyboard hardware is faulty after all software fixes are exhausted, a keyboard replacement is the permanent solution.

Conclusion

HP Pavilion 15 keyboard not working on Windows 11 is fixed by reinstalling the HID keyboard driver from Device Manager, disabling Filter Keys and Sticky Keys in Accessibility settings, and clearing corrupted keyboard filter drivers from the registry. Use the on-screen keyboard to perform these fixes if the physical keyboard is completely unresponsive. The registry UpperFilters cleanup resolves the most stubborn keyboard blocking issues where the driver reinstall alone does not restore function.