Error attempting to boot from Onboard NIC.

Hopefully this is in the right forum, but from what I could figure from Google responses, the "onboard NIC" has to do with wireless. Maybe I'm wrong. If I am, direct me to the right board and I'll post this there. Thanks.
Anyway, I almost always get this error message upon starting my computer.

ERROR attempting to boot from Onboard NIC.
Software error: device not in BEV locator.
Press any key to continue.

This message always comes up directly after the DELL startup screen (the one where DELL is in huge white letters and the progress bar goes by on the bottom). After that it will proceed with a normal boot and usually everything is fine.
Occasionally, however, the computer will randomly hang/freeze/stop responding. This will, if it happens, tend to occur about five to ten minutes after everything has finished booting up. I will have to restart.
Also, and less frequently, I will get a BSOD. After restarting here I will have to adjust the clock in the setup before the computer actually boots. Then, once on, the error report will come back mentioning a driver error.
Finally, I recently downloaded the DELL Crash Analysis Tool. After running it and fixing most of the problems (only two are left: cdudf_xp.sys and NavEx15.sys) I'm still getting the above-mentioned error message after each restart (I've had to restart many times after installing and such to fix some of the things the Crash Analysis Tool returned).
The strange thing is that most of this time this message will come up but will do nothing to hamper my computing once everything is booted up and working. Still, the hanging and BSOD is frequent enough that this has frustrated me to no end. I would appreciate ANY help ANYBODY can provide me. Thanks a bunch.