have a unique SID. If you cloned a hard drive to multiple PCs without changing the SID, "bad things" would supposedly happen—security holes, network conflicts, or even system crashes. Richard M. Hicks Consulting NewSID v4.10
If you truly need to change a SID today (likely due to a cloning error), these are the standard paths: newsid v4 10 link
For modern operating systems like Windows 10 and 11, Microsoft recommends using official deployment tools: have a unique SID
: Administrators could use the /a switch for automated runs, facilitating batch deployments. Why NewSID Was Retired "bad things" would supposedly happen—security holes