Ran update from within TCMD 12.10.59 on Vista 64. Installation was almost complete when I got the attached error. Clicked OK, installer closed, and TCMD came up running 12.10.60, but not in the correct starting directory (it was a uniquely named temp directory with no contents, at least none that were non-hidden as shown by a dir). Closed TCMD and reopened. Started fine and in the correct starting directory.