ERUNT is an excellent Registry Backup and Restore Utility for Windows NT/2000/2003/XP/Vista. This program backs up the DEFAULT, SAM, SECURITY, SOFTWARE, SYSTEM hives and also the per-user registry hives namely NTUSER.DAT & USRCLASS.DAT.

ERUNT works fine in Windows Vista if run under elevated privileges. To run the application elevated, right-click the file ERUNT.EXE which is located in "C:\Program Files\ERUNT" and choose Run as Administrator. Additional instructions are available in article Take a complete registry backup using ERUNT.

Note: Running ERUNT in a non-elevated mode would display the following error:

RegCreateKeyEx: 5 – Access is denied.

Create Automatic Registry Backups at Vista Startup

Using Task Scheduler, you can configure ERUNT to backup the registry at Startup (Note that ERUNT does not create a new backup if one already exists for the current day.) Follow these instructions:

1. Open Task Scheduler from Control Panel or by running the command control schedtasks from Start, Search box.

2. In the Actions pane on the right, click Create Task…

3. Type a name for the task that you want to create (for example, ERUNT), and optionally assign a descriptive text.

4. Click Change User or Group… button

5. Type SYSTEM and click OK

6. Enable the option Run with highest privileges. This is an important step.

7. Select the Triggers tab, and click New

8. In the Begin the task drop-down box, select At startup, and click OK

9. Select the Action tab, and click New

8. In the Program/script: text box, type the following (including the quotes):

"C:\Program Files\ERUNT\AUTOBACK.EXE"

9. In the Add arguments (optional) text box, type the following:

(Hint: Read ERUNT’s documentation to know the command line arguments supported.)

10. Click OK, OK.

You’ve now created a new task to backup the registry at every Startup. To verify if the task works, restart Windows and check the C:\Windows\ERDNT\AutoBackup folder.

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6 Comments

  1. Pierre
    said this on Tuesday, June 15th 2010 5:42 pm

    Thanks for taking the time to create this post, some of the simplest things are hard to figure out.

  2. said this on Thursday, December 18th 2008 4:05 am

    [...] – Erunt. I started using this small tool a while ago, and after a couple of weeks I have spotted an interesting article that shows how to configure Erunt using task scheduler, so it is being run every time your Windows [...]

  3. said this on Friday, September 5th 2008 5:26 am

    [...] – Erunt. I started using this small tool a while ago, and after a couple of weeks I have spotted an interesting article that shows how to configure Erunt using task scheduler, so it is being run every time your Windows [...]

  4. said this on Saturday, August 30th 2008 2:10 am

    Your instructions worked perfectly. However, I have since removed ERUNT from my system but the scheduled task still remains and I have no way of deleting it. The task shows up in the Task Scheduler Summary pane but not when I click on Task Scheduler Library, so there is no option to delete. Thanks.

  5. Kat
    said this on Saturday, August 9th 2008 7:03 am

    P.S.S. and your feed is now sitting on my iGoogle home page.

  6. Kat
    said this on Saturday, August 9th 2008 7:01 am

    I just wanted to say thanks. This was a very timely fix for me. After using ERUNT on my XP desktop, I, of course, downloaded it on my new Vista laptop. It wasn’t until the next day (at startup) that I first encountered the dreaded and confusing “RegCreateKeyEx: 5 – Access is denied.” I bemusedly clicked OK and then NO (after the YES option to try again only proved to be a loop)for more than a month, never actively searching out an answer but keeping my eyes open for one in case I came across it, in my travels. I finally gave up a week or so ago and uninstalled it. I was so psyched when I lucked upon your blog tonight after work, that I have reinstalled and successful applied your fix. Thank you, Thank you, Thank you!
    P.S. and my laptop thanks you!

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