Frequently Asked Questions (FAQ)

This page answers some of the most commonly asked questions I get via e-mail regarding ERUNT and NTREGOPT. So before contacting me, please look here first if your question is already answered.

Question: Do ERUNT and NTREGOPT run on Windows 7?
Answer: ERUNT and NTREGOPT in their current versions 1.1j are still compatible with Windows 7, but as in Vista, they will only work correctly if you turn off User Account Control in Windows' Control Panel (move the slider to the lowest position).

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.

Future versions of ERUNT and NTREGOPT will of course have these issues fixed. Keep an eye on my homepage for updates.

Question: Do ERUNT and NTREGOPT run on Windows Vista?
Answer: Yes. To make sure the programs are executed with proper administrative privileges, you should however turn off User Account Control in Vistaís system settings.
Question: Do ERUNT and NTREGOPT run on 64-bit Windows?
Answer: Yes, version 1.1j and later fully support all 64-bit editions of Windows. Older versions may cause problems, so be sure to use the latest one on these systems.
Question: Do I need to uninstall old versions of ERUNT or NTREGOPT before installing a new one?
Answer: No, simply install the new version over the old one. This will also keep any settings you may have specified in the ERUNT.INI file. (During installation, the current "ERUNT AutoBackup" shortcut is deleted from the start menuís Startup folder if present. If you had customized AutoBackupís command line then you will need to do so again after installation of the new version.)
Question: Should I disable Windows XPís System Restore function when using ERUNT?
Answer: Yes! Though System Restore backs up more than just the registry, the registry is essentially all you need to revert your system to a previous state. Advantages of ERUNT over System Restore are that each restore folder is standalone and independent of the others, minimizing the risk of restore failures, and that a restore can easily be done from outside Windows. Also, ERUNT backups usually take up less hard drive space than System Restoreís restore points and may be individually deleted at any time. (Here is an excellent site about System Restore in case you prefer to leave it enabled.)
Question: I want to change the number of days from which ERUNT AutoBackup keeps restore folders.
Answer: Click "Start" Ė "Programs" Ė "Startup", right-click "ERUNT AutoBackup", choose "Properties", then at the end of the command line add a space and the /days:n switch where n is the new number of days.
Question: Sometimes ERUNT or NTREGOPT fail to save / optimize a registry hive and I get a "RegSaveKey: 1450" error message.
Answer: This error is described in the documentation; no fix from me.
Question: I tried to run the restore program, but can only find a file named ERDNT.E_E. When I rename this file to ERDNT.EXE and run it, I get an error message "Could not open file ERDNT.INF".
Answer: The restore program must be run from each restore folder, NOT the ERUNT program folder.
Question: My registry is broken, so I downloaded your program to fix it. How do I do it?
Answer: You canít. ERUNT is based on the backup and restore principle, which means you can restore a good copy of the registry only if you previously created a backup. In the future, use ERUNT to make regular registry backups.
Question: My virus protection software reports a virus in ERUNT and/oder NTREGOPT!
Answer: All versions of ERUNT and NTREGOPT downloaded from the official website are free of viruses, trojans and spyware. This is a false positive in your virus protection software, and you should inform the manufacturer immediately and request that they remove it as soon as possible.
Question: ERUNT Ė what kind of stupid name is that!?
Answer: ERUNT is short for "Emergency Recovery Utility NT" and got its name from ERU for Windows 95 Ė itís basically ERU for NT-based systems.
Question: These programs are so cool! Why are they freeware?
Answer: Because I love freeware! :-) However, you are gladly invited to make a donation if you want.