My test system is set to upgrade to Windows 10 Insider builds. Apparently, I'm on the fast ring, as it upgraded to build 10525 this morning. After it killed Chrome (known issue, Google is working on it), it also killed HDMI Audio. Remove and reinstall doesn't seem to fix it. If I try to play any sound, it says the device is being used. Turning off exclusivity doesn't fix it. Any suggestions?