NewSID
NewSID is a Windows utility that was designed to generate a new Security Identifier (SID) for a Windows installation. Developed by Sysinternals, its primary purpose was to allow cloning or deploying Windows images without producing duplicate SIDs that could cause conflicts in workgroups or domains. By replacing the machine SID with a unique value and updating related security identifiers, NewSID aimed to give each copied system a distinct identity.
The tool is typically used on an image that will be deployed to multiple machines. After imaging,
NewSID became controversial as practices for Windows deployment evolved. Microsoft and the broader IT community generally