Hello, I believe I have a different issue than that of some others on this thread post anniversary update on my SP4 i7 256. I have reset the device back to factory (no audio), I have updated it to post anniversary (no audio), I have installed different releases of the Realtek HD Audio (SST) Driver (v220.127.116.1111, v18.104.22.16834). I have also ran the surfacepro diagnostic toolkit, which gives the following error codes: Volume Rocker Test Element not found. (Exception from HRESULT: 0x80070490) Mic Test WinMM.DLL returned 282 (0x0000011A) Speaker Test Element not found. (Exception from HRESULT: 0x80070490) I have also ran the audio troubleshooter to no avail. -I have also tried the various suggestions of disabling fastboot etc. however my issues seem to be a bit different regarding that particular issue, anyway. Thanks in advance.