|If you cannot get back into the BIOS set up to repair a bad setting, there are a couple of ways to clear your CMOS.|
First unplug the system from the AC power.
Then depending on your system you either move the CMOS jumper from the stand by pins to the clear pins for a few moments and return it, or remove the CMOS battery, press the power button a few times, and then replace the battery. (A few motherboards now have a clear CMOS button but I doubt yours has this.)
Then you need to go into your BIOS set up, Reset Defaults, and then manually set your time, date, and check your CPU, Memory, Hard drive, and boot order (possibly others), Save and Exit.
You have to be a little bit crazy to keep you from going insane.
---- Save Big Bird -----