Every cloned Windows system needs a unique computer SID. This SID changer command line utility changes the local computer SID to new random value. There is no installation program. Run SIDCHG /help for usage information. Allows SID change of running Windows or non-running Windows on a specified drive. Please note: This advanced system tool makes deep changes to your system. It is not for normal usage. Once started, do not interrupt SID Change in process!