amitksee,

You will need to install  drivers for these devices. Starting with the chipset drivers first. Below is a link to download drivers for your system as well as a list of drivers to install in a certain order.

Inspiron N4110 Drivers

Driver Install Order

Intel Centrino Wireless-N 1030

Intel Proset Wireless:

http://www.intel.com/support/wireless/wtech/proset-ws/sb/CS-034041.htm

Intel Bluetooth:

http://www.intel.com/support/wireless/wtech/proset-ws/sb/CS-034060.htm

Thanks for the reply NATAKUC4, I am online now after downloading the driver from your first link. But from the second link, I could not install the driver because it gives me error saying I need window 7 SP1 or window 8. This tell me I don't have window 7 SP1. I just have window 7. Is there way to solve this problem? I have exclamation on SM Bus controller and USB controller. Thanks again ;)

Download all the Windows 7 Updates using the WSUS Offline Update:

http://dellwindowsreinstallationguide.com/wsus-offline-update/