Hi Ritesh,
As you have re-installed Windows 8, I would recommend you to install the drivers from Here in correct order as mentioned Here.
- Once the drivers are installed, you may check in Device Manager if any devices are available with yellow bang under Other Devices :
- Press Windows + X and click on Device Manager
- Exapnd Network Adapter and Other Devices and check if there are any yellow bang marks
- Please share the Hardware Id of Wireless card or Network Controller. You may right click the device under Device Manager and click on Properties -> Details -> Hardware Id
Please reply with the findings. I would be glad to help you.