NTUser.dat

Among the more annoying deficiencies of roaming user profiles in terminal server farms is what came to be known as “last writer wins”. It looks like Microsoft is trying to address the issue in the upcoming next version of its operating systems. Although this is a step in the right direction, I have doubts about the effectiveness of the cure.

Some time ago I wrote about a misconception so common that it might pass as an IT legend - the confusion of HKU\.Default with the default user’s registry hive. Recently I came across another interesting misapprehension. As you know, the profiles base directory (usually C:\Documents and Settings) contains not only one special sub-folder, Default User, but also All Users, whose purpose is well-known: When Explorer builds the start menu and the desktop it pulls entries both from the logged-on user’s profile and from the all users folder. That is, by the way, the reason why standard users (i.e. non-admins) cannot modify some of the icons on the desktop and in the start menu - those that reside in the All Users folder, which is writeable only for administrators.