Now I remember why I dont buy used cars, works for notebooks too. Sound does not work: keyboard does not respond to volume control, so I checked software and no drivers. I don't have time for this crazy making. Screen light density does not work does not respond to keyboard, software didn't respond either. And the keyboard works 70% of the time on some functions. The mouse pad also feels a bit twitchy. That's enough to drive you crazy. I also expected it to be faster than it is. Not happy, and I don't recommend buying used notebooks or laptops.