Well, the thing is that I've bought this laptop recently and the keys haven't worked since then. And it appears that they were not even installed. Therefore I downloaded the driver from HP page and it says the installation was successful but I still don't have them. I should have this icon
but I don't.
On HP page advised that if some problems occurs with these Quick Launch Buttons, the BIOS should be updated, so I also downloaded BIOS update driver. The result is the same , not working.
Anyways, I tried SFC/SCANNOW and Malwarebytes but it found nothing.
I performed a full scan with my own antivirus. It found a few threats so I deleted them, though I don't think they caused this problem.
I'm not sure I'll be able to do A Repair Install because I don't have the Windows 7 install disc and it seems it's necessery to have it.