Remove the installed motherboard rechargeable battery to power the chip, which stores a record current settings BIOS.This is the most radical and reliable way, but it requires a physical, rather than software manipulation, so pre-you will have to shut down the operating system, turn off the computer from the network and remove the side panel of the system unit and look on the motherboard that same battery ("the pill").Do not rush to install the battery back - for greater confidence usually recommended to wait for about five minutes, a
nd then do all these manipulations in the reverse order.
Return the factory BIOS settings using the corresponding jumpers on the motherboard - this option can replace the above-described manipulation of the battery.For this, too, need to get immediate access to "inside" the computer, removing one of the panels (most often - left) his body.Look for the correct jumper near the battery - next to him on the board to be etched inscription CLR_CMOS or CCMOS.Rearranging the jumper to another position and you return the initial settings BIOS.
Take function reset BIOS, provided in the control panel of the basic I / O system.For this initiates a reboot the host operating system and enter the settings panel BIOS - most of it is done by pressing the Delete key during the boot process, but depending on your version of it can be keys F1, F2, F10, Esc, or even a combination of the CTRL +ALT, CTRL + ALT + ESC, CTRL + ALT + INS.Information that is to be pressed, generally appears at the right moment in the bottom left of the screen in English.Once in the settings panel, it is best to call the help key (F1) to find and return the assigned function factory settings button - the corresponding entry may, for example, be formulated as Load Optimal Defaults and assign a function key F9.By clicking on the appropriate button to exit the panel, while keeping the changes.