What kind of check do you need to do on your hard drive? If you want to run a diagnostic test you can normally download one of these from the website of the drive manufacturer. It won't matter if the disk has Windows, DOS or anything else on it. You could also try using a
UBCD, which has several drive diagnostic tools on it.
As for the BIOS question, you can ask in the
Hardware forum.
Edit: Added link to UBCD.