RE: DELL INSPIRON N5110 15 BLUETOOTH IS NOT WORKING IN WINDOWS 8.1 x64
Please uninstall the Dell WLAN and Bluetooth driver from device manager, follow the steps below.
Start > in search box type in device manager > under the network > select the wireless and bluetooth and right click on it and uninstall and check the box (delete the software for this device). Restart your computer. Install the Dell wireless/bluetooth driver which I have provided in my previous post.