There are five primary, or root, branches of the Registry, each containing a specific portion of the information stored therein. These root keys can't be deleted, renamed, or moved, because they are the basis for the organization of the Registry. They are:
This branch contains the information that comprises
your Windows file types. See the discussion of file types in Chapter 4 for details on the
structure of most of the entries in this branch. A few special
keys here, such as
(short for Class ID), contain
"registered" components of Windows and your installed
applications. The contents of
HKEY_CLASSES_ROOT are generally easy to
edit, but it's best not to mess with anything in the
CLSID branch, because almost none of it
is in plain English.
This entire branch is a symbolic link, or "mirror," of
is displayed separately in this branch for clarity and easy
This branch contains a sub-branch for the currently logged-in user, the name of which is a long string of numbers, which will look something like this:
This number is the SID (security identifier), a unique ID for each user on your system. See Chapter 8 for more information on SIDs.
While it may sound like a good idea to edit the contents of
this branch, you should instead use the
HKEY_CURRENT_USER branch described later, which is a symbolic link, or "mirror," of this branch. No ...