http://bugs.winehq.org/show_bug.cgi?id=21938
--- Comment #15 from Paul Vriens Paul.Vriens.Wine@gmail.com 2010-03-07 10:04:05 --- I've reproduced this with my Vista Business laptop (actually a partition I use solely for running winetest).
Will do some more tests (I'm using partimage for quick reverts) and see if the registry (before and after) shows some differences. Can't promise when though.