Sid is called security identity, that is, network security sign. It is used to uniquely identify computer accounts, user groups, and user accounts. It is determined by three parameters: computer name, current time and the sum of CPU time spent by the current user mode thread to ensure its uniqueness. Many system softwares use this tag to uniquely identify a user.

Secondly, check the sid of this machine.

1)cmd Enter the command line and enter who I am/all. View the sid information of the currently logged-in user.

2)Regedit enters the registry and enters the configuration file list of HKEY _ local _ machine software Microsoft windows ntcurrentversion, with sid on the left and user name corresponding to sid on the ProfileImagePath on the right.

Third, modify the sid.

When cloning a system on a virtual machine or installing a system using a ghost image, you will encounter the same sid problem. In this case:

For win2003 or win xp systems, you can extract two files from the deployment, syspre.exe and factory.exe. Under the supporttools file of the installation package. Then run syspre.exe and choose repackage.

If it is a win7 system, you can run syspre.exe C in the following path: Windows System 32 sysprep. Just choose repackaging.