@agent47er: My laptop model is Copmaq 620. Serial No. is: CNU0321V5K. Hope this will help you!
@Danny: Oh! sorry sir. I just filled out the system specification as required
@mrdemon: I tried what you said and the icon of bluetooth is displayed in the taskbar. But when I search for any bluetooth device near me it just not showed. This problem was from when i buyed this laptop. What you guys think? Is bluetooth adapter is damaged or what??