Hi Sumeet,
Thank you for posting your question in Microsoft Community.
You seem to have an issue with using Bluetooth devices on your computer. We will help you in fixing the issue.
Install the following update and check the issue status.
Bluetooth devices do not work correctly on a computer that is running Windows 7
http://support.microsoft.com/kb/980396
I would also suggest you to try following methods and check if it helps.
Method 1:
Please use suggestions provided in this help article and check the issue.
Refer:
Troubleshoot problems with Bluetooth enabled devices
(Also applies to Windows 7)
Method 2:
Please use suggestions in this article and check the issue status
Bluetooth devices do not work correctly on a computer that is running Windows 7
http://support.microsoft.com/kb/980396
Additional Information:
Add a Bluetooth or other wireless or network device: frequently asked questions
Add a Bluetooth enabled device to your computer
http://windows.microsoft.com/en-US/windows7/Add-a-Bluetooth-enabled-device-to-your-computer
Hope this helps. Please do let us know if you further help.