How to check your SID using PsGetSid? | Windows Server 2008 and Microsoft virtualization blog
I don’t think that MS ever fully supported NewSID as a way of changing computer SID in production enviroment. Sysprep was and is the safest way to do it. ... http://www.brajkovic.info/wsblog/windows-server-2008/windows-server-2008-r2/how-to-change-sid-on ...