BleepingComputer.com: Command Line Options For Erunt

ERUNT command line switches
---------------------------

ERUNT supports command line switches with which you can perform an
automated registry backup, without user interaction. The syntax for
the ERUNT command line is as follows:

ERUNT DestinationFolder [sysreg] [curuser] [otherusers]
[/noconfirmdelete] [/noprogresswindow]

DestinationFolder is required for command line operation of ERUNT,
all other switches are optional.

If you specify a destination folder on the command line, ERUNT
automatically runs in "silent" mode and with default backup options
(system and current user registry). No user interaction is required,
EXCEPT the confirmation of the restore folder deletion if it exists,
or any error messages. The confirmation question can be suppressed
by using /noconfirmdelete (see below).

Description of the command line switches:

DestinationFolder
The name of the folder where the registry backup should be saved.
Example: C:\WINDOWS\ERDNT
You can use the strings #Date# and #Time# anywhere in the folder
name to have ERUNT insert the current date/time at that position.
Example: C:\WINDOWS\ERDNT\#Date#
Windows' %SystemRoot% environment variable can be used on the
command line as a substitute for the name of the Windows folder.
Example: %SystemRoot%\ERDNT\#Date#

sysreg
Backup the system registry

curuser
Backup the current user registry

otherusers
Backup other open user registries

(Note: If none of the three above options is given on the command
line, ERUNT automatically uses the default backup options, system
and current user registry.)

/noconfirmdelete
Automatically deletes the contents of the destination folder if it
exists, without asking the user. BE CAREFUL and only use this option
if you are sure that the contents of that folder may really be
deleted!

/noprogresswindow
Hides the progress window during backup.

So, to backup the system registry to folder C:\ERDNT each day of the
week using subfolders with the name of the current day you could use
the integrated scheduler in Windows to schedule seven different ERUNT
calls for each day:

For Monday you would use the command line
C:\ERUNT\ERUNT.EXE C:\ERDNT\Monday sysreg /noconfirmdelete

For Tuesday you would use the command line
C:\ERUNT\ERUNT.EXE C:\ERDNT\Tuesday sysreg /noconfirmdelete

... well, you get the idea.

Or, to have ERUNT automatically backup the registry on each Windows
startup to a folder named "ERDNT" inside the Windows folder, including
a folder named the current date, you could place a shortcut like the
following in your Start Menu/Programs/Startup folder:

C:\ERUNT\ERUNT.EXE %SystemRoot%\ERDNT\#Date# /noconfirmdelete

If you want old restore folders created this way to be deleted
automatically from time to time, you can use AUTOBACK.EXE instead of
ERUNT.EXE. The AUTOBACK tool is described later in this document.
Also, ERUNT Setup offers the choice to add an AutoBackup shortcut to
the Startup folder automatically during the installation process.

Running ERUNT with the default settings will back up your registry to Windows/ERDNT automatically at each startup.

Yeah, like I said, I read all of that documentation. I've been manually deleting the old backups since I installed ERUNT in January.
I guess I'll figure out what I missed and how to run it at startup.

It might be easier to just uninstall and reinstall ERUNT to do that.