..is an unknown group or a group with no members.
??? S-1-1...is the ???world??? group that includes all users.
??? S-1-2...is a local user logged into ???terminal.???
??? S-1-3...is the creator of an object (file, folder, etc.).
??? S-1-4...is a non-unique user identifier.
??? S-1-5...is a standard user account.
Aside from some of the solutions that use SIDs, they can be an issue if you
clone your machine, at which time you may have to change your SID.
Microsoft??™s System Preparation Tool (SysPrep) can be used to do this.
Permissions and Security | 463
Users and
Security
Note that permissions can only be used on files and folders stored on NTFS
volumes (see the discussion of NTFS in Chapter 5).
Set Permissions for a File or Folder
Shockingly, Microsoft actually took default permissions seriously when
designing Windows Vista. In previous versions of Windows, everyone with
an account on your PC had access to every file on your hard disk; if you
wanted to protect your private data, you had to take matters into your own
hands. In Vista, defaults are set to protect your private data from other
users, and to protect Windows operating system files from all users.
Of course, no progress is without its price. Some of Vista??™s defaults are so
restrictive that they can break certain software not expressly written for
Vista, as described in ???Control User Account Control,??? later in this chapter.
To give someone access to your files, or to further restrict access, you??™ll need
to mess with his or her permissions.
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