I'm running Windows XP SR1, yes, I've been running a registered version of Media Jukebox 8 that I upgraded ages ago to versions of MC 9, and today when going from .210 to .213 the the problem started. Then I uninstalled, which maybe was a mistake. Having done that, cleaned out the registry, and still getting this error with two versions of MC (210 and 213), it's not the install files. I've copied over version 180 from a backup machine, including the registry keys that will hopefully let it load. Now when trying to load it I get the message that it isn't registered. When I use a restore file downloaded today to re-register it, I get "Failed to create registration control." I *think* if I can get the registration to work, the backup might load. And if I strip it out again, I'm sure I'll get the buffer overrun. In fact I don't know how I'm going to upgrade from here on out, but if I can get some version running I'll live with it while I can collect my wits...