Fn & brightness keys don't work & says: HP application enabling services isn't installed or not run

[AfshinAfshin]

when I press Fn key + brightness keys (F5 & F6), the brightness of display doesn't work and can't adjust brightness. Also the Other keys+ Fn key don't work, just volume+Fn key is working. After pressing the error says "HP application enabling services is not installed or not running". windows is 10.

[AfshinAfshin · Accepted solution]

1-First download and install HP PC Hardware diagnostics.

2- Click on section "system information"

3-Click on " Launch HP image assistant"

4- wait until  it finishes the scan of your HP drivers .

5- you see how many drivers are uninstalled or out of updated. 

6- Click on Download all and wait for completion.

7- restart the HP notebook.

8- Fn + brightness keys will work.