Operation method
Turn on the Dell laptop and press F2 quickly and continuously as soon as the Dell logo is displayed.
When this interface appears, you will enter the BIOS of the motherboard. If this interface does not appear, restart and continue to press F2 until you enter the BIOS.
After entering, use the left and right keys to turn the white highlight block to the last "Exit" above, and select "load optimal defaults" below
An inquiry dialog box appears. Select "YES" with the left and right keys, and the factory settings will be restored.