Dell Latitude E5420 wireless not working

I have installed all the drives, still i cannot connect my laptop via wireless though I can connect to net via LAN Cord.

Hardware Ids are as follows -
PCI\VEN_14E4&DEV_4727&CC_0280
PCI\VEN_14E4&DEV_4727&CC_028000
PCI\VEN_14E4&DEV_4727&SUBSYS_00101028
PCI\VEN_14E4&DEV_4727&SUBSYS_00101028&REV_01

Kindly let me know which driver i need to install.

Request you to revert at earliest.

Many Thanks

Lakhuraj Chhatwani