Bluetooth Issues If you suddenly can't connect your Bluetooth headphones, mouse or keyboard, there are a few things you can try:  Make sure Bluetooth is turned on. You can do this by going to the taskbar and selecting Action Center (it looks like a message square). If you don't see Bluetooth, select Expand. You should then see Bluetooth, and be able to select it to turn it on. If your device isn't paired with any Bluetooth accessories, it will say "Not connected." Your other option is to go to Start > Settings > Devices > Bluetooth and turn it on there.  Check your Bluetooth device. Make sure your accessory is turned on, is charged or has fresh batteries and is close to your Windows 10 device. You can then try turning off the Bluetooth device and turning it back on after a few seconds. If it's still not working, make sure it's not too close to any other USB device plugged into a USB 3.0 port, since those can interfere.  Check your Windows 10 device. Make sure airplane mode is turned off (Start > Settings > Network & Internet > Airplane mode). Try turning Bluetooth on and off (see above). Finally, try removing the device and adding it again (Start > Settings > Devices > Bluetooth & other devices. Select the device you're having trouble connecting, and choose Remove device > Yes). 

Problem: I can't hear the sound on my computer Solution 1: Check the volume level. Click the audio button in the bottom-right corner of the screen to make sure the sound is turned on and the volume is up.  Solution 2: Check the audio player controls. Many audio and video players will have their own separate audio controls. Make sure the sound is turned on and the volume is up in the player. Solution 3: Check the cables. Make sure external speakers are plugged in, turned on, and connected to the correct audio port or a USB port. If your computer has color-coded ports, the audio output port will usually be green. Solution 4: Connect headphones to the computer to determine if you can hear sound from the headphones.