Since its not coming up with anything else it could be something as simple as your date and time are wrong. Try accessing setup from the first screen as soon as you turn your computer on. Usually its F1, F2, F12, Del keys.. And check they're right.
If thats the problem then you could attempt to reset the CMOS. I WOULD NOT suggest this if you're not sure what you're doing as you could BLOW your motherboard. If you have a slight idea, look through the motherboard booklet you got with your computer and find out where it tells you how to reset the BIOS/CMOS. It will involve something like removing all power cables, changing a jumper from certain pins to others, leaving it for a few seconds then MOVING IT BACK! This way should set everything back to standard..A
Amit Patel, March 2009