Why you need to use SysPrep tool with VM’s

If you plan to have VM’s that are joined to a domain or  if you have a WSUS server and want your VM’s to have access to the WSUS updates, you need to use Sysprep.  According to the VMware forums, WSUS needs all of the client servers/OS to have unique ID’s. This is super easy to do.

Since sysprep.exe is installed with the OS in Windows Vista and Windows Server 2008 (or newer), there is nothing to down load. Just follow the directions below…

Navigate to “C:\Windows\System32” and double click SYSPREP.


Configure the Sysprep dialog box as shown below and click OK…


Sysprep will run for a minute or two.


When completed, your VM will reboot.  A new security ID (SID) will have been created, and the clock for Windows activation will be reset. Don’t forget to re-run Windows activation. Remember… when the VM restarts, the OS will be in Windows Welcome mode just as if a fresh installation completed. You  will have an opportunity to customize the Windows operating system, create user accounts, name the computer, and perform other tasks.

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