Over the life of an operating system install, configuration changes can occur that prevent the operating system or applications from functioning correctly.
When a formerly working installation suddenly fails, a natural troubleshooting step is to return to the last working configuration that existed when the operating system, service or application last worked, or in an extreme case, return the operating system to its out-of-the-box configuration.
This article describes supported and unsupported methods to undo or rollback changes to the following elements:
· Permissions in the Registry, File System and Services.
· User rights assignments
· Security policy
· Group membership
For windows vista : secedit /configure /cfg %windir%\inf\defltbase.inf /db defltbase.sdb /verbose
For windows 2000/2003 server : secedit /configure /cfg %windir%\repair\secsetup.inf /db secsetup.sdb /verbose
For more information: http://support.microsoft.com/kb/313222