ReviewerDate ReviewedVersionRatingReview
seelengarten Aug 17, 2005 1.1i
5 out of 5
Einfach perfekt! Danke! ChR
bellotte Jul 7, 2005 1.1h
5 out of 5
get this right now
mike_loldrup Mar 8, 2005 1.1h
5 out of 5
Brilliant. Exelent and much much more
works fine and free.
get this right now
paulablan May 29, 2013 1.1j
5 out of 5
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
Cic-cio Oct 22, 2005 1.1j
5 out of 5
Excellent Software!
JCMacintosh Sep 13, 2016 1.1j
5 out of 5
I use ERUNT since Windows 98 and I find myself using it again with Windows 10...
This tool is really great !!
DougCuk Jan 9, 2012 1.1j
5 out of 5
The ERUNT installer will setup an automatic daily registry backup when using Windows XP.
However to get the automatic ERUNT backup working correctly under Vista or Win7 see my install notes here:
allesok Apr 25, 2012 1.1j
5 out of 5
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.
carlvui May 25, 2010 1.1j
5 out of 5
Absolutely reliable, I have used many times and it never caused any problems to my registry, all recoveries were 100% successful.

Did perfect job even when Windows own system restore failed.
Philidor Jul 19, 2011 1.1j
5 out of 5
To use with Vista, Windows 7, right click on the shortcut and run as administrator.
Lighthouse Mar 16, 2008 1.1j
5 out of 5
Superb program
But may I suggest to users that they save to another partition/or ext disk than that which houses the OS
Sometimes on a reinstall/restore (Vista) it wipes out the ERDNT folder
wizard68sc3 Oct 22, 2005 1.1j
5 out of 5
Awesome, gotta get it.
biligt Oct 30, 2008 1.1j
5 out of 5
This version gets detected as Win32.TrojanSpy.Banker with Ad-Aware 2008. Why it's detected as virus?
BeloSol02 Aug 13, 2012 1.1j
5 out of 5
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.
grimpr Aug 20, 2007 1.1j
5 out of 5
A small,efficient and easy tool for taking care the Windows registry with 2 superb solutions.

ERUNT backups all the requisite registry files for a complete restore incase of failure via program run and IF you choose,automatically via Windows startup which i highly recommend.

NTREGOPT comes and really shines as the supreme registry optimizer, its fast,its safe, and really compacts the registry. From various tests i concluded that efficiently compacting the registry,which this program excels,has a positive effect on Windows.

This program bundle along with CCleaner and JkDefrag is all you need for taking care your Windows installation.

Excellent freeware, highly recommended.
wat0114 Oct 21, 2005 1.1j
5 out of 5
Incredibly easy to use and an extremely effective system recovery utility.
Zoroaster Oct 21, 2005 1.1j
5 out of 5
Excellent, both for registry backup (ERUNT itself) and optimization (NTREGOPT). Of course, it's always better to perform the optimization on a clean registry (JV16 Power Tools 2005 for instance). Recommended by *everyone*, I'm sure!
zee7 Jun 10, 2006 1.1j
5 out of 5
Highly Recommended. Small and Efficient.
grenneam Oct 8, 2013 1.1j
5 out of 5
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!!!!
paulm Oct 21, 2005 1.1j
5 out of 5
I only bother with using NTREGOPT, as I do regular full partition backups.
*It is very important to reboot the PC immediately after running this registry defragmenter to load the optimised registry, BEFORE making any other changes to the registry.*
Have used this programme for a few years now. Absolutely flawless, and a great companion to my two favourite FREE registry cleaners. EasyCleaner and RegSeeker 1.45. Apart from regular file defragmenting, these three programmes are the most usefull and important maintenence programmes for Windows.
NO ONE should be without them!
lewisw Mar 21, 2017 1.1j
5 out of 5
Under W7 I found that I had to run NTREGOPT registry optimiser and ERDNT registry recovery in SAFE MODE in order to avoid various warnings and errors. They then worked fine for me.
rcutnik Oct 22, 2005 1.1j
5 out of 5
This application has saved my time (tremendous time!) by allowing me to work my registry OFFLINE!
Excellent tool!
some guy Oct 21, 2005 1.1j
5 out of 5
great program
great when installing a new program on your computer that writes to registry. and messes it up theirs your back up:) good job
guevara Oct 21, 2005 1.1j
5 out of 5
Used this for a very long time
and this is
and easy to use
(and free)
Get this right now !
wagner reatto Aug 29, 2004 1.1d
5 out of 5
i already had a problem with windows 2000 registry, and this utility made a excellent job, returning to previous level. i use it before installing any software too.
httpd.confused Jul 8, 2004 1.1d
5 out of 5
I submitted ERUNT to FileForum days ago, but is this my entry? When I submitted it, I put up a proper description, and I used accurate OS compatibility info--but the info shown here is inaccurate (ERUNT also supports WinNT; learn to read!). Well, at least they used my screen shot.

In any event, ERUNT is great. Don't run WinNT/2K/XP/2K3 without it! This version lets you easily restore from the Recovery Console, which is a nice touch. I've had nothing but perfect reliability with ERUNT (and NTREGOPT).
mike_loldrup Jul 20, 2004 1.1d
5 out of 5
i can recommend this one.
very good
guevara Sep 16, 2004 1.1d
5 out of 5
Super work
optimizer that do the job

get this
wagner reatto Dec 1, 2004 1.1g
5 out of 5
very good job!
ljfnord Dec 1, 2004 1.1g
5 out of 5
ERUNT has saved my bacon a couple of times, even when System Restore failed miserably. HIGHLY recommended.
fair_is_fair Dec 1, 2004 1.1g
5 out of 5
This is THE replacement program for windows system restore. It is well documented that system restore is unreliable, a virus haven, and a resource hog. Erunt is small, fast, and simple. Best of all - it WORKS! Turn off system restore and use this program. You will love yourself for doing so.
H_TeXMeX_H Dec 11, 2004 1.1g
5 out of 5
This program has saved me from disaster (i.e. having to format hard drive and reinstall Windows) more times than I can count. And NO the Windows built-in system restore does NOT WORK !!! This program, on the other hand, DOES WORK ! This is why I love this program and hate Windows ssssooooooooooooo much ! If you haven't tried this program, I strongly recommend you do, it really works, unlike Windows ! Mar 12, 2012 1.1j
4 out of 5
Just unzipped it, configured it, and ran it in Win7-64 Pro. For safety, I decided not to use the install file, just the ZIP'd file. Because I have been using computers since the Apple II+ days, before MS-DOS was even written, configuration was straightforward, simple, and easy. For these small but essential utilities, I prefer not using an installer anyway. The default folder for AUTOBACKing the Registry is:

As someone mentioned before, when AUTOBACK is launched in the StartUp folder, this will not work in Win7. The explanation is in ERUNT_Tweaks_Win7.txt. I decided to just use an AUTOBACK Desktop icon with a CTRL+SHIFT+ALT+A shortcut key. This way I can do a quick backup anytime I want. The ERUNT README.XT file states the backup will take "some time." I found this humorous because on my i7, SATA system, it took 2½ seconds. The Win7 Registry is quite bloaty at 168 MB's.

If you have a second drive or partition, I highly recommend you do NOT create your backups on the C: partition. If you get a BSOD, you can get file corruption. Save your backups on a different partition. Because another reviewer complained how long it took to create the command line, here is what I decided to place on the shortcut:
Target: "C:\Program Files (x86)\ERUNT\AUTOBACK.EXE" D:\ERDNT\#DATE#-#TIME# sysreg curuser otherusers /noconfirmdelete /days:14
Start in: "C:\Program Files (x86)\ERUNT"
Shortcut key: CTRL+SHIFT+ALT+A

You must create and place the above shortcut on your DeskTop for the Shortcut key combination to work correctly. This will give you 14 days of backups. To avoid any conflicts should you do multiple backups on the same day, I have added the time to the folder name.

Be aware, ERUNT v1.1j was written in 2005, 4 years BEFORE Win7 was released. Therefore, I do not recommend you use the included NTREGOPT utility. Other reviewers have complained they've had problems with NTREGOPT.

The restore utility is called ERDNT. Since I just started using ERUNT, I have not yet had cause to use ERDNT. Hopefully, I won't but it's good to know I have a backed up Registry.