Jason Freeman wrote:
> I was looking under the Task Scheduler, and some tasks are set to run
> using one of the following accounts:
> What are these accounts? [...] Why do they exist and what purpose do they serve?
These are built-in accounts or account groups.
The built-in accounts are the system accounts that "your computer is
logged in as". There are multiple accounts in order to artificially
limit what the system can do depending on what it is doing. This
increases the security of your computer, as Windows security can allow
or deny the computer access to something depending on which system
account it is using.
Besides Windows operating system programs, third-party software that
install service programs or scheduled tasks can use these accounts.
Built-in groups are kind of like tags that Windows puts on a user
account when the account logs in. It is used by windows security to
allow or deny a user access to resources based on this special
information (i.e., are they logged in over the network, have they
entered a password or not, etc.).
Some built-in groups are used for management purposes. You control which
users belong to these groups, and they exist to allow you to easily
control what privileges the users on your computer are assigned (e.g.
the users and administrators groups).
> 1.) SYSTEM
This account is used by system programs and has the full privileges of
> 2.) NETWORK SERVICE
This account is used by system programs that run on your computer that
need access to the network.
> 3.) Authenticated Users
This group is used to identify users that have logged in with a username
> 4.) LOCAL SERVICE
This account is used by system programs that run on your computer but do
not need access to the network.
> 5.) Users
This group is used to identify the users of the computer. As an
administrator, you control who is in this group.
> Is it possible to login as them?
You cannot log in as a group.
When you see a group like this in task scheduler, it usually means that
the scheduled task will run whenever any user of that group logs in.
You cannot easily log in as a system account, but I would not say it is
Microsoft MVP - Windows Shell/User
Windows Vista Support FAQ - http://www.jimmah.com/vista/