It says boot.ini failure and then it still boots? The bios is unrelated to microsoft windows. What the bios is, is a setup screen which allows you to configure certain low-level hardware options related to your processor and motherboard. To get to it, there is a specific key you have to press when your computer first turns on - it's different for every computer (usual choices are F2, F8, Del, Esc)
Regardless, on first guess I would say your Windows boot.ini file is malformed. Check out the following website to edit your boot.ini file. What I would like you to do is open up your boot.ini and copy its contents here so I can see if it's okay looking. Something else to do is to check it yourself against the sample boot.ini provided on this site:
http://support.microsoft.com/default.aspx?scid=kb;EN-US;q289022