RE: Dell upgrade package failed to install dell wifi driver
Dear Aniketh Sreenivasan,
I've solved the problem with your comment. I had installed window 8.1 when I posted the question. That time the wifi card wasn't found a place in device manager. After I read your comment, I installed window 10, it magically worked. I can use wifi now. The laptop was sold with window 8.1 and allowed free upgrade to window 10. So, it is weird that Dell only offers its drivers for window 8.1.
Thanks again for your response. You saved me!