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NewSID requires administrative privileges to run. It has two functions: changing the SID, and changing the computer name. For example:. Would have NewSID run without prompting, change the computer name to "newname" and have it reboot the computer if everything goes okay.
Simply choose the "Synchronize SID" button and enter the target computer's name. You must have permissions to change the security settings of the target computer's Registry keys, which typically means that you must be logged in as a domain administrator to use this feature.
Note that when you run NewSID that the size of the Registry will grow, so make sure that the maximum Registry size will accommodate growth. We have found that this growth has no perceptible impact on system performance.
The reason the Registry grows is that it becomes fragmented as temporary security settings are applied by NewSID. When the settings are removed the Registry is not compacted. As with any software that changes file and Registry settings, it is highly recommended that you completely back-up your computer before running NewSID.
This key has a value named F and a value named V. The V value is a binary value that has the computer SID embedded within it at the end of its data. NewSID ensures that this SID is in a standard format 3 bit subauthorities preceded by three bit authority fields. NewSID 's generation takes great pains to create a truly random bit value, which replaces the bits of the 3 subauthority values that make up a computer SID. Three phases to the computer SID replacement follow. When the SID is found in a value it is replaced with the new computer SID, and when the SID is found in a name, the key and its subkeys are copied to a new subkey that has the same name except with the new SID replacing the old.
The final two phases involve updating security descriptors. Registry keys and NTFS files have security associated with them. Security descriptors consist of an entry that identifies which account owns the resource, which group is the primary group owner, an optional list of entries that specify actions permitted by users or groups known as the Discretionary Access Control List - DACL , and an optional list of entries that specify which actions performed by certain users or groups will generate entries in the system Event Log System Access Control List - SACL.
The first part of security descriptor updates occurs on all NTFS file system files on the computer. Every security descriptor is scanned for occurrences of the computer SID. The second part of security descriptor updates is performed on the Registry. First, NewSID must make sure that it scans all hives, not just those that are loaded.
Updates are performed the same as for files, and when its done NewSID unloads the user hives it loaded.
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