By default there is no password in Setup, so unless you made one just leave it blank and hit Enter. If you made a password you will have to take out the CMOS battery for about 20 minutes to reset your machine
Just a question, when you say setup the usual way is just to keep tapping F2 when booting. I am assuming you mean re installing. I may well have misunderstood you, or is it simply the BIOS Password you have lost? Can you explain a bit more.
What happend was...pc started to do silly things, and then ie7 would not respond so I done a sys restore with no effect ( I assume a virus ). At the moment I am running avast/superantivirus and ccleaner. if these dont work then I will have to do a re-install ( hope not ). so to change the boot order (F8) It is asking me for a password. Also my Norton has dissapeared off the face of the earth