unable to use bluetooth on my laptop

Feb 17, 2018
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.