Re: Wifi ,lan, audio , usb not working

Hi kishan3,

I would suggest you to perform system restore for the date the system was working properly. Click the link mentioned below to perform system restore:

http://dell.to/VRG2ad

NOTE: System restore will remove the applications installed after the restore point.

If the issue persists, Please click the link mentioned below which will take you to the drivers website:

http://dell.to/QjjZDA

Enter the Service Tag of the computer and choose the Operating System installed on the computer. Please update the latest version of drivers and BIOS available.

NOTE: Ensure that the battery is more than 30% charged and the adapter is connected during the BIOS update.

Also, you may click the link mentioned below to open the drivers page for your system model directly:

http://dell.to/QtFK85 

Thanks & Regards
Manshu S
#iworkfordell