Someone set a password, the BIOS will not just set one on it's own. You
failed to mention the make/model of PC, if it's a desktop take the side
cover off and look for a BIOS clear jumper or remove the battery for a bit,
if it's a laptop it may require disassembly, some laptops you can't clear at
all.

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Crosspost, do not multipost http://www.blakjak.demon.co.uk/mul_crss.htm
How to ask a question http://support.microsoft.com/kb/555375
> upon starting my computer when i press delete to enter setup it asks for a
> password. i have never setup a password. i have tried every passwor that i
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>
> thanks