Edit: This method usually works but there is an easier way explained by @Instinctlol in the comments below. You might want to try that way first!
When I first got these headphones they worked perfectly with my phone but trying to get them to connect to my Windows pc seemed hopeless. In my case, they paired & pressing 'connect' showed the headphones as connected, but the audio device was disabled & disconnected in sound settings. I later realised that they instantly connected & worked properly with my newer laptop, so the following guide was produced by imitating the setup my laptop automatically configured. This is something you should only have to do once when initially pairing the device.
- First ensure that you are attempting to pair the device as WH-1000XM3and notLE_WH-1000XM3. I'm not sure what the latter is for but it will not let you connect/play sound. If you cannot see the device, check that you have not already paired it or try holding the power button for ~7 seconds when turning the headphones on to place them in 'bluetooth pairing' mode.
- Attempt to connect to the device under 'Bluetooth & other devices'. In my case this doesn't work, giving That didn't work. Make sure your Bluetooth device...
- Open Device Manager and look under Bluetooth. If your case is the same as mine, the headphones will be listed as just WH-1000XM3.
- Right-click WH-1000XM3and clickUpdate driver>Browse my computer for driver software>Let me pick from a list of available drivers on my computer> UntickShow compatible hardware> SelectMicrosoft Bluetooth Avrcp Transport DriverunderMicrosoft>Yes.
- Under Bluetooth & other devices(in system settings like before) click onDevices and printerson the right panel. FindWH-1000XM3 Avrcp TransportunderDevices.
- Right-click WH-1000XM3 Avrcp Transport>Properties>Hardware. Click onBluetooth AV>Properties>Change settings>Driver>Update Driver>Browse...>Let me pick...>Microsoft Bluetooth A2dp Source.
- The audio device at this stage will still show Disconnected, but the Bluetooth device will connect.
- In the Propertiespanel you had open before forWH-1000XM3 Avrcp Transport, click onBluetooth Remote Control>Change settings>Driver>Update Driver>Browse...>Let me pick...>Microsoft Bluetooth Avcrp Transport Driver.
- The audio device should now show connected and will allow you to play music.
The final step is only for if you wish to optionally use the device in 'headset mode'. It seems like there are two modes for the device - 'stereo mode' and 'headset mode'. Due to some limitation of Bluetooth, using the microphone on the headphones drastically reduces the quality of the sound. So this is only a feature you want to enable when you need to use the microphone.
- Under Propertiesagain, click onBluetooth Hands-free>Properties>Change settings>Driver>Update Driver>Browse...>Let me pick...>Microsoft Bluetooth Hands-Free Profile AudioGateway Role.
There will now be two additional audio devices - a speaker & a microphone. If either of these are used WH-1000XM3 Stereo is disabled and sound is instead played from the WH-1000XM3 Hands-Free AG Audio device (at a much lower quality).
Enjoy your new Sony headphones :)


Solved my issues with my XM3 Headphones. You were so helpful, thank you!