Airpods Not Working With Windows 10 Computer

Hi, i have an ASUS - bt400 bluetooth dongle, with up to date drivers functioning on my windows 10 computer. For some reason i cannot get my airpods first generation to connect up. I can discover and pair the headphones in the bluetooth setting, however when i heard over to the sound control panel/playback devices, it is not showing up, and therefor i cannot use them for playback or recording. I have tried a few solutions, like deleting the hidden driver in device manager, and adding the registry line -
Regedit > HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control\Class\{e0cbf06c-cd8b-4647-bb8a-263b43f0f974}\0000 > New "String Value" > Name it PnPCapabilities and set value 24 (screenshot attatched to show i have entered it correcly.)

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