You can also use an external Keyboard or replace it with a new one. If these methods have not worked on your HP ProBook Laptop then Contact the manufacturer if your Laptop is under Warranty period. Here is How to Factory Reset HP ProBook Laptops. Hard reset will remove all the data from your Laptop.

If any one of the above methods cannot resolve your problem then Hard Reset is the only option to get your Laptop in Factory state.

Click on the Options button and make sure the keyboard is selected to the US.

On the left side choose the Region & Language option and set it to English (United States).

Click on the Start button and Select settings or type settings and press Enter.

Right click on the option and select Update Driver. 6 week ETA though on the new keyboard (US keyboard being shipped to UK, as I bought in the US and prefer the US layout) so until that arrives back I couldn't tell you if it was indeed a hardware issue or not. Sometimes you have to press (fn) key together. If you are not sure whether this item can work on your laptop, we will help you to confirm it. If your still stuck take a photo of your keyboard attach in comment.

It's now with HP to have the keyboard replaced. then you can put the new keyboard into it.

All you need to do is recap the method 2 where you have to go the Device Manager page and click on the keyboards category and select on the option. Mine also stopped working (although it did work out of the box) after a few weeks of use.

Download the latest Driver for your HP ProBook Laptop.

If the solutions provided above cannot resolve your problem then you can try updating drivers.

If your HP ProBook Keyboard is not working properly then updating drivers can fix your problem.

If the keyboard driver is not working you can use On-screen Keyboard by clicking on the middle icon from the three provided on the right bottom of the lock screen in Windows 10.

Restart your Laptop and then keyboard driver will be automatically installed on your Computer. Backlit keyboards make typing in low-light conditions a whole lot easier, and if you bought your laptop within the last few years, chances are you have one.

Hp backlit keyboard not working