Hello, 

let me describe my problem, hopefully someone can help.

I formated my Dell latitude E6420 last week a instaled windows 7 on it. After that i instal drivers from dell page: www.dell.com/.../advanced

Last thing i instaled was: Dell Latitude E6420 System BIOS, after that my system restarted and now it cant start windows. Every time i start PC, it says: BIOS revision A07,there is waiting bar, whitch goes completed and then after few moment it starts again, but windows never shows up. I tryed einstal windows, but it didnt help. 

Pls help me,

Thank you, Jan