Btw, now that I'm at work ... during your POST Screen Yomu you will see something that says, "Press F12 for boot options". When you hit it, your prompted for a few options, choose the system setup and that will take you to the BIOS screen where you will choose video or SHOULD choose video and turn off your Optimus feature.

Sorry took so long but not having a POS Dell at home, I hand build my stuff, I couldn't remember the sequence >.<