The following are the short steps on how to change the SIDs safely.Ĭheck the current SID by running the following command in Powershell. In order to duplicate SIDs prevention, the only supported Windows operating systems are through use of SysPrep the built-in Windows tool, which generates new SIDs. The user SIDs are built based on the machine SID and a sequential relative ID. This can often happen when machine SIDs are duplicated by a disk clone, common for pirate copies. If this user SID is duplicated on another computer, a user of a second computer having the same SID could have access to the files that the user of a first computer has protected. This can be prevented by setting access control lists on a susceptible file, such that the effective permissions are determined by the user SID. In a WORKGROUP of computers running Windows, it is possible for a user to have unexpected access to shared files or files stored on removable storage.
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