This is not a major problem, the main cause for this problem is using the pc boostup softwares like PC doctor, etc. These softwares disable few services which must be startup automatically on your windows PC. Inorder to activate it manually simply go to START button and kindly type "services" in the text box and select it. It opens a window, in that select the services having name Bluetooth and select startup type as automatic by right clicking on it. Do the same thing for another service too, that is HUMAN INTERFACE DEVICE ACCESS. Then the problem is solved!