ERUNT 1.1j

4.7 out of 5 stars 4.7 (68 votes)


Windows 2000/Server 2003/XP / Freeware / 11,321 downloads

ERUNT is a registry backup and restore program for Windows. You can backup the registry to a folder of your choice. System and current user registries selectable. Command line switches for automated registry backup and restoration. Restore the registry in Windows and MS-DOS. Included in the package: NTREGOPT program for optimizing the registry.

Reviews of ERUNT

  1. 5 out of 5 stars

    Reviewing 1.1j (Sep 13, 2016)

    I use ERUNT since Windows 98 and I find myself using it again with Windows 10...
    This tool is really great !!

  2. 5 out of 5 stars

    Reviewing 1.1j (Oct 8, 2013)

    if you are running your windows PC without this program you are NUTS! My butt was just saved because I had installed it on a friends PC which shortly afterward (days) suffered a catastrophic failure where it would not boot. Using the Windows CD I was able to finally get to the ERDNT folder and restore the registry to a known working condition. It was my final attempt after about 5 hours of trying to achieve some sort of progress on a PC that appeared to be suffering from some inexplicable Hard Drive failure. However the hard drive when placed in another PC was producing no symptoms of problems. God Bless the Writer of this software. It is OUTSTANDING!!!!

  3. 5 out of 5 stars

    Reviewing 1.1j (May 29, 2013)

    Fabulous program. Saved me from the fbi virus and have used other times when registry corrupted. If your laptop will not load, easy solution if you have another computer is to place the hard drive in a usb case and connect to working computer. Modify inf file for the backup you want to use to change the drive letter to the drive letter your hard disk in the case is showing and then click on the backup. Have not tried yet on windows 7, but great for xp

  4. 5 out of 5 stars

    Reviewing 1.1j (Aug 13, 2012)

    To get the daily Registry backups in Windows 7/Vista without completely turning off MS's UAC, run TweakUAC v1.0. Select 'Quiet Mode'. Now eruNT runs as it did on prior MS Windows versions.

    Be careful about directing your Registry backups to a drive other than C:. You won't be able to see them, nor run erdNT from outside of Windows, if you have to use the Recovery Console.

  5. 5 out of 5 stars

    Reviewing 1.1j (Apr 25, 2012)

    I have used ERUNT since many years, mainly with Windows XP. It is definitely one of the best tools you can find! Now I am using Windows 7 and am a bit concerned that it could cause some complications. The reason is the statement in the FAQ on the website: “Also, a problem has been discovered which on many systems causes ERDNT and NTREGOPT to display a ‘RegSaveKey: 3’ error when optimizing / restoring the BCD00000000 hive. The cause is that after a clean install of Windows 7, the BCD part of the registry which contains Windows’ boot configuration data, resides on a hidden system partition with no drive letter assigned in Explorer. You can simply ignore this error and continue, or as a workaround, open Disk Managemant in Control Panel and right-click on the partition displayed as ‘System Reserved’ to assign a drive letter.”

    I only find two “Healthy Primary Partitions” (one big and one small) that have no drive letters at all, and I cannot assign a drive letter to any of them. “Change Drive Letter…” is grayed out. Maybe things are different in Windows 7 Ultimate, or maybe they changed with SP1 or some update.

    So I am strongly hoping and eagerly waiting for a new version that is completely compatible with Windows 7, without any potentially scary little problems! It seems to have been announced for quite some time now…

    In my Windows 7 Ultimate I can go to Control Panel > Administrative Tools > Computer Manage-ment > Disk Management – I don’t see a more direct way… – and there I cannot find any “System Reserved” anywhere. So what can I do?

    Is there any risk involved with assigning a drive letter to it, once I have found it? What can in the worst case happen if I simply ignore the error, as mentioned above? And what do ERUNT and ERDNT do once I have found “System Reserved” and given it a drive letter? And also: How does Windows 7 Ultimate react if I give it a drive letter?

    I have the feeling that these points do need some clarification.

Discuss ERUNT

  1. Jan 8, 2012 - 11:39 PM

    To check which User accounts are included in the backup open the file ERDNT.INF - the restore paths for the numbered User folders are listed at the end of this file.

    To get ERUNT working correctly under Vista or Win7 see my install notes here:

  2. Feb 3, 2010 - 8:49 AM

    I installed and ran erunt for the first time. This looks like a great program; however, the question I have is: After doing the backup, I went to the users folder in the backup destination and noticed that the users are numbered. How does one know which user is which? I would like to be sure that a particular user is backed up. Any suggestions would be appreciated. Thanks, Joe.