Computer won't start up completely

Hi there!  I have a Dell Vostro 200 home computer that as of yesterday does not want to fully start up.  When I push the on button I get the familiar whir of the computer starting and the familiar beep that happens right before booting up.  Then the familiar Dell screen comes up that is usually the last step before the computer fully starts up..  However the computer remains on this screen and goes nowhere else.  I can hear either the fan or computer running but it does not go from this Dell screen to Windows log on. 

Let me describe the Dell Screen.  Mostly black with a blue Dell logo on it.  On the upper right it has "F2 = Setup" and "F12 = Boot Menu"  (neither of these do anything when pushed nor does F8 when pushed).  There is an intel logo on the bottom right and  below the Dell insignia is "BIOS Revision1.0.10"

Any ideas on how I can troubleshoot this?  Probably 90% of the data is already backed up so it isn't the biggest loss in the world but I'd still like to access the other 10%.

Thanks so much for any help whatsoever!

PS.  I just tried to reboot from the Windows reinstallation disc and nothing happened.  I still could not get any where other than the Dell screen I described above