pci,dell wireless 5540,ethernet controller,network controller

Have you checked the Dell Support site? I wouldnt recommend that you download drivers from an untrusted site. That's a great way to get a root kit installed on your system.

I have neither WiFi nor driver on my PC and I want it installed.

I want to know Myanmar Local Internet Service Provider Details List.

You need to hit www.dell.com and use the Support link. Your Dell has a service tag # on a sticker, probably on the bottom of the unit. Enter the Tag # and you are given a page with links to all drivers for the OSes that unit supports.

Or, call dell tech support at 1866-516-3115 and have the tech help you out. Just give them that #. They will help you find a driver even if it is out of warranty.