I too scanned earlier with autorun and decided to look it up and found your comment. For me, BthA2dp is also marked unverified despite it being a Microsoft Bluetooth A2dp driver: Bluetooth A2DP Driver. I analysed them with mcaffee just in case there were touched by a virus (because earlier i suspect i accidently clicked on a suspicious exe. I did my analysis and all and wanted to do a final check that's what brought me to autorun). I'm kinda glad i'm not the only one with this weird unverified problem.
Waiting for answers to your question too...