Hi Sharad_vaddoriya,
Welcome to the Community.
I would like to inform you can turn on the wireless radio on your Vostro 1014 by pressing the Fn and F2 keys together. This is common for any dell laptop. If you are still having issues with the wireless, check in the device manager for any bangs on the wireless driver. The wireless driver should be listed under network adapter in device manager, if it is listed under other devices it means that the wireless adapter is missing needs to be reinstalled.
You can reinstall the wireless drivers from www.support.dell.com
The direct link for the Vostro 1014 drivers: http://dell.to/AidgTv
Please respond in case you need any further assistance or clarification.
Glad to help!
Abhishek Banerjee
Social Outreach Professional
You can reach us at: www.en.community.dell.com