Well you're going to have to reset the bios....
2 ways to do this on most mobo's...
*but*
FIRST make sure you unplug your computer completely from the wall or you could have a fried computer.
Option 1) (best one)
There should be a reset bios jumper somewhere on the motherboard (should be labeled somewhere). Usually a 3 pin...Move the jumper over, leave it for a few seconds and move it back.
Option 2) Pull bios battery. Wait 5 min or more...Reinsert
Good luck.
If I was your dad I'd kill ya too!