RDilly 
RDilly is program that makes a backup copy of the NT,2K,XP registry.
It's very similar to System Restore found in WinME and WinXP.
You get a point-in-time copy of the registry labeled with the date
it was made. You also are able to restore the registry to this point-in-time
copy.
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message thread on Ars Technica (may require registration)Instructions/Information
Manually run or schedule RDilly to run. Everything is automatic
and transparent, so it doesn't interrupt you. A new folder will be
created in the same folder RDilly is located with the date
(in YY-MM-DD format) and a serial number starting with 001 as its name.Start, Finish, and Error messages are placed in the Application Eventlog under the source name "RDilly". In this folder, you will see the same hive names you see in %SystemRoot%\system32\config. The hives are ready to manually copy in the case of a disaster. If the system is bootable, RDilly can restore the registry in just a few clicks.
The HARDWARE hive is included in the backup folder - this files is for debugging purposes only.
I suspect this program must be run with local Adiminstrators rights or Backup Operator rights. It needs to have Backup rights (SeBackupPrivilege) to read the HKEY_LOCAL_MACHINE\SECURITY key. Also, it must be able to create and delete the files it created in the [%SystemRoot%\System32\Config] folder.
Requirements
Windows NT,2K,XP or higher. For Vista, this program must be run as Administrator to function.
Download
|
RDilly v1.1.0 (source inclued) ZIP [200 KB] |
Changes in v1.1.0
New: GUI Window to restore from an RDilly registry backupChanges in v1.0.1
New: Added RDILLY.INI file to set date formatNew: ERROR LEVEL (aka exit code) set on a failed execution for batch files
NO WARRANTY
ANY USE BY YOU OF THE SOFTWARE IS AT YOUR OWN RISK. THE
SOFTWARE IS PROVIDED FOR USE "AS IS" WITHOUT WARRANTY OF
ANY KIND. TO THE MAXIMUM EXTENT PERMITTED BY LAW, THE
SOFTWARE'S CREATOR DISCLAIMS ALL WARRANTIES OF ANY
KIND, EITHER EXPRESS OR IMPLIED, INCLUDING, WITHOUT
LIMITATION, IMPLIED WARRANTIES OR CONDITIONS OF
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
THE SOFTWARE'S CREATOR IS NOT OBLIGATED TO PROVIDE
ANY UPDATES OR UPGRADES TO THE SOFTWARE. ANY INCLUDED
SOURCE CODE MAY BE MODIFIED AND DISTRIBUTED FOR NON-PROFIT
USE ONLY.
ANY USE BY YOU OF THE SOFTWARE IS AT YOUR OWN RISK. THE
SOFTWARE IS PROVIDED FOR USE "AS IS" WITHOUT WARRANTY OF
ANY KIND. TO THE MAXIMUM EXTENT PERMITTED BY LAW, THE
SOFTWARE'S CREATOR DISCLAIMS ALL WARRANTIES OF ANY
KIND, EITHER EXPRESS OR IMPLIED, INCLUDING, WITHOUT
LIMITATION, IMPLIED WARRANTIES OR CONDITIONS OF
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
THE SOFTWARE'S CREATOR IS NOT OBLIGATED TO PROVIDE
ANY UPDATES OR UPGRADES TO THE SOFTWARE. ANY INCLUDED
SOURCE CODE MAY BE MODIFIED AND DISTRIBUTED FOR NON-PROFIT
USE ONLY.