unable to use bluetooth on my laptop

[vpiyush292000]

I am using acer aspire 5755 laptop which had bluetooth working earlier in win. 7 but after my upgrade to win 8.1 i am not able to use my buetooth feature. i tried to install a driver from acer's official website but during installation i am prompted with a text like "no bluetooth device detected, please make sure device is plugged in properly" .
please help me out.

 

[Phillip Corcoran]

Bluetooth adapter may have failed - - you can buy one which plugs in to a USB port - - they are very small and compact now, only protruding by about half an inch.