changing SID OS lost

[eieima]

is it posible to recover my OLD SID if i change it? and how cause i can boot windows.

 

[logicearth]

Why did you change the SID?

 

[mikedl]

Apparently NEWSID.exe has created problems for others as well.

NewSID.exe HELP!!!!!!!!!
Usig Sysprep to replace NewSID please help - Windows 7 Forums
NewSID problem with win7 x64 - Windows 7 Forums
Windows.old folder - Restore into a new installation - Page 3 ...
Admin acount no longer has admin privileges? - Windows 7 Forums

There are many more to be found by searching these forums.

Here is a bit about NEWSID from Mark Russinovich, the author of the tool.

The reason that I began considering NewSID for retirement is that, although people generally reported success with it on Windows Vista, I hadn’t fully tested it myself and I got occasional reports that some Windows component would fail after NewSID was used. When I set out to look into the reports I took a step back to understand how duplicate SIDs could cause problems, a belief that I had taken on faith like everyone else. The more I thought about it, the more I became convinced that machine SID duplication – having multiple computers with the same machine SID – doesn’t pose any problem, security or otherwise. I took my conclusion to the Windows security and deployment teams and no one could come up with a scenario where two systems with the same machine SID, whether in a Workgroup or a Domain, would cause an issue. At that point the decision to retire NewSID became obvious.

I'm with LogicEarth: Why use NEWSID?

I apologize to eieima as none of this helps with the issue. Sorry.