Wrote down the notes after solved an access issue [1, 2, ,3, 4].
|Predefinied local account||Yes, local authenticated users||Yes, local authenticated users||Yes|
|Privileges in local computer||minimal, run standard least-privileged services||minimal, run standard privileged services||Extensive, have access to most system objects. Most services do not need such a high privilege level. If your service does not need these privileges, and it is not an interactive service, consider using the LocalService account or the NetworkService account.|
|Token||NT Authority\System, Builtin\Administrators|
|Network identity||Anonymous user*||Act as the computer on the networks, computer’s credentials (computer$). By default, the remote token contains SIDs for the Everyone and Authenticated Users groups.||Act as the computer on the networks, computer’s credentials (computer$)|
|Note||By default, the Local System Account is a member of the local Administrators group and is therefore a member of the sysadmin group in SQL Server.|
ATTN: * – Anonymous user is not equivalent to everyone. Everyone means a group of all authenticated users.