the both of ALt keys doesn't work

[sayed3li]

the both of ALt keys of my notebook doesn't work for a period i do not think it is an hardware proplem and i do not know what should i do 

[KrazyToad]

@sayed3li

Welcome to HP Forums. This is a great place to get support, find answers and tips.

I have gone through your Post and would like to help

Please update the BIOS from this Link: https://support.hp.com/us-en/drivers

Also reinstall the keyboard driver from Device Manager

- Select the Start  button, type Device Manager, and select it from the list of results.
- Look for Keyboard and expand the List
- Look for Keyboard driver then right-click it, and select Update Driver.
- Select Search automatically for updated driver software.
- If these steps don't work, try reinstalling the driver: Open Device Manager, right-click the Keyboard driver and select Uninstall. Restart your Notebook and Windows will attempt to reinstall the driver.

If the issue persists please run a Keyboard test to confirm the Hardware functionality

- Hold the power button for at least five seconds to turn off the computer.
- Turn on the computer and immediately press Esc repeatedly, about once every second. 
- When the menu appears, press the F2 key.
- On the main menu, click Component Tests and Keyboard

Keep me posted how it goes

Thank you and have a wonderful day 😊

If the information I've provided was helpful, give us some reinforcement by clicking the "Solution Accepted" on this Post and it will also help other community members with similar issue.