My PC, on boot screen, says: <F1=Setup>
When I press F1 it says 'Entering Setup...'
But next screen displays a lot of data and in the end it says:
"Primary Master Drive ATAPI Incompatible
Press <F2> to Continue"
and when I do, it boots Vista (default OS) instead of entering setup...

How to get rid of this "Primary Master Drive ATAPI Incompatible
Press <F2> to Continue"
Problem?