|See if you can't get the owners manual. It should show how to clear that password.|
I agree that I'd have guessed set to default would have fixed it but each system is different. Be sure to save it when done.
By the way, setting to default settings could have some effect if you built your computer. Timings and voltages may now be off. If store bought it should be OK.
1/3 of highway deaths are caused by drunks. The rest are by people who can't drive any better than a drunk.