The BIOS is at the beginning of booting the computer. Most often this is pressing the Del key, in the bottom of the screen you will see a banner: Press Del to enter setup. Can use other keys such as F1, F2, F3, F10, Esc, or Ctrl + Alt + Esc.
If you enter the BIOS failed, you will see a blue or gray window with multiple tabs. Find the section Advanced and then navigate to it using the keys "Right" and "Left". In this tab select Onboard Device Configuration.
Look for the Onboard Device Configuration string to Onboard Camera. Beside her, in the value field must have the value Enabled ("Enabled"). If Disabled (Off), set the desired value using the keys "Up" and "Down".
Save the changed settings. To do this, press F10 or select Save and exit setup. In the resulting window, confirm saving the changes by typing Y and pressing Enter. After the reboot, the operating system should see the camera.
If in the BIOS the camera is turned on, but still doesn't work, look for item in BIOS Install OS and set beside him the value of Finish. If instead the Finish is the Start, the camera will not work.
In that case, if in the BIOS you don't find many items in the settings, you'll likely see an incomplete version. To display all information try pressing Ctrl + F1.
Very often problems with the camera are not related to the BIOS, and with the lack of necessary drivers. Check to see if Windows sees the camera, simply right-click on the icon "My computer" on the desktop and select the context menu item "Properties" then "Hardware" - "device Manager". Look for device with yellow exclamation or question mark. Click on it twice with the mouse, select the tab "Driver" and click "Reinstall driver".