Most technical folks have stumbled across the registry hive HKEY_USERS\.Defaultat some point. Many of them think they know what it is used for. Interestingly, most who do are wrong. The misconception about what HKU\.Default is used for dates back to the good old days when Windows NT 4.0 was still considered „new technology“. This misconception has been, and still is, passed on to future generations by means of books, magazine articles, blog entries and geek talk.