For me the reason was having remains of a previous installation of Norton Power Eraser (NPE) ...
This debug was enabled by NPE though a registry key. I disabled the debug output by deleting the "NPETraceSession" registry key and all sub keys at:
[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\WMI\Autologger\NPETraceSession]
Thank you for posting this additional info. If I had known about the reg key location last year, I could have deleted the WMZuneComm ETL process holding my user directory hostage. I eventually resigned and let Windows create the user.000 folder however, even after the upgrade WMZuneComm was still creating the logs in the old user directory. After your ppost I was able to find an entry in the registry location you provided and delete it permanently. Good riddance.