I have a Dell Inspiron 11 3168 laptop and I reset the system password. I downloaded the manual and found no instructions for resetting the bios. I did find instructions on changing the coin battery. I undid that conector and the main battery connector and waited a couple minutes. I reconnected them and put the laptop back together as per the manual. I started the computer and received a warning about the bios but I clicked ok and the computer started up.