Make sure Discovery is enabled for your Bluetooth devices. (Go to Settings > Devices > Bluetooth > More Bluetooth options. Then make sure “ Allow Bluetooth devices to find this PC ” is enabled.) Then try removing and then re-pairing the Bluetooth device. Uninstalling the bluetooth device entirely (the system automatically re-installed it) More @Wikipedia
Hover over any link to get a description of the article. Please note that search keywords are sometimes hidden within the full article and don't appear in the description or title.