Well... yes and no. I had a look around at some of the other topics involving MSCLOCK.DLL, and went into safe mode to delete it. After a reboot I got a clean bill of health from ewido, the Microsoft AntiSpyware Beta, and Spysweeper.
Then... I ran SpyBot again and it found the same registry entry HKEY_USERS\S-1-5-21-3464014514-3941539683-980751038-1006\Software\LanConfig which it identifies as MagicControl Agent.