Fix for Error 100 Invalid Class String in Internet Explorer When Opening Organize Favorites

© Ramesh Srinivasan | Internet Explorer | 18th December 2009

When you click the Organize Favorites option under the Favorites menu in Internet Explorer, the following error occurs and the Organize Favorites dialog appears blank as in the graphic below:

An error has occurred in this dialog.
Error:100

Invalid class string

This happens due to missing Microsoft JScript registration. And the fix is to register the DLL.

Windows XP

1. Login to an account that has administrative privileges.

2. Click Start, Run. Type the following command:

regsvr32 jscript.dll

3. Press {ENTER}

Windows Vista and Windows 7

1. Open an elevated Command Prompt window. To do so, click Start, click All Programs, click Accessories, right-click Command Prompt, and then click Run as administrator.

2. Type the following command:

regsvr32 jscript.dll

3. Press {ENTER}

You should see the "DllRegisterServer in jscript.dll succeeded." message box.

Logoff and login back. See if you’re able to open the "Organize Favorites" dialog in Internet Explorer successfully.

Related Posts


Email SubscriptionPrefer an E-mail subscription?

Enter your email address:

Delivered by FeedBurner

10 Comments

  1. Jeff
    said this on Friday, January 13th 2012 5:01 am

    Worked first time just as stated for WinXP, I’m so grateful. Thank you.

  2. tekmarvl
    said this on Sunday, October 9th 2011 1:32 am

    Very helpful, and it worked. I’m surprised that this solution wasn’t offered by
    Microsoft’s own support team on their own support forums!

  3. cirocco
    said this on Monday, August 1st 2011 2:03 am

    great fix, worked immediately!!

  4. Bozo4545
    said this on Sunday, March 27th 2011 12:04 am

    It fixed the favorites problem and also fixed the problem of micosoft update not being able to change to windows update.

  5. Goran
    said this on Friday, March 4th 2011 5:09 am

    Thanks. This fixed issue I’ve been having with e-bank on website opened through “favorites”.

  6. Rana
    said this on Monday, January 3rd 2011 12:51 am

    Nope, comea back that it’s not capable of registering it. :(

  7. ralgh
    said this on Monday, November 29th 2010 7:01 pm

    Now that i have bought a new PC with new software this problem also didn’t occur anymore

  8. Barbara
    said this on Tuesday, November 16th 2010 8:25 am

    Awesome, that worked beautifully, and only a few seconds work. Thank you!

  9. Phaze
    said this on Wednesday, November 3rd 2010 3:08 am

    This fix worked! I tried 2 others and nothing just a different error 104.

  10. ralgh
    said this on Saturday, September 4th 2010 2:04 am

    I am still using Windows XP and had the same problem as a nonprivileged user, not as administrator, but the hint didn’t fix the problem.

Leave a Reply