Suddenly can't access local users and groups permissions list

In computer management (my computer / manage) "Local users and groups" icon has a red x on it and when I click on it I get this message:

Local users and groups
Unable to access the computer {computer name} toa. The error was: library not registered.

How can I find which library is not registered, so I can register?

BTW, this is one of several very similar problems that began to arrive after the last update of Microsoft Windows Vista.

Hello GCCarvill,

Thanks for posting your question in the Microsoft answers Forum.

If you have a system restore point, before applying the updates would be the fastest way to restore the library file
who is missing. Use the following article to restore to an earlier point in time. Don't forget to create a manual restore point before using an earlier version of the operating system.

936212 KB - how to repair the operating system and how to restore the configuration of the operating system to an earlier point in time in Windows Vista
http://support.Microsoft.com/kb/936212

You can also create a manual system restore point so that you can restore in case of problems.
How to create a system restore point manually:
Right-click on the computer icon in the desktop, then choose Properties
In the left pane, click System Protection
Alternatively, to directly access the System Protection tab, click Start and type SystemPropertiesProtection.exe.
If you are prompted for an administrator password or a confirmation, type the password or provide confirmation.
Click the System Protection tab and then click on create.
In the System Protection dialog box, type a description, and then click on create.

After the search for the other forums, I found another user having a similar problem. They used a tool called FileMon and after comparison, they discovered a file called activeds.tlb was missing. They have restored a copy in the system32 directory and
was then able to access the local users and groups successfully. You can download a copy of FileMon of:
http://www.sysinternals.com

If please reply back and let us know if it helped to solve your problem or if you need further assistance.

Thank you

Marilyn
Microsoft Answers Support Engineer
Visit our Microsoft answers feedback Forum and let us know what you think.

Tags: Windows

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