His Bluetooth A2dp source is not working properly and drops error code 52. A recent hardware or software change might have installed a file that is signed incorrectly or damaged, or that might be malicious software from an unknown source. There is error message "Windows cannot verify the digital signature for the drivers required for this device. Microsoft Bluetooth A2dp source (error code 52) Microsoft Bluetooth A2dp source not working properly. I encountered the problem (when writing the post a week ago) via the collection service here, the entries are from September 2019, but the better introduction is this Microsoft Answers forum thread, dated August 13, 2019, where the issue has already been discussed.
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