What does file verclsid.exe do?

Posted on 2006-04-12
Last Modified: 2011-08-18
Yesterday the Microsoft Updates were downloaded and installed on my home computer system and today I'm noticing problems with Internet Explorer.  Specifically when I type anything into the address bar, a program starts running in the task manager called verclsid.exe it is in the system32 folder.  After this happens IE locks up until I end all events of verclsid.exe then it will function again for one item and it starts again.

Does anyone have any suggestions
Question by:psuguru97
    LVL 48

    Expert Comment

    Hi psuguru97,

    all i can find so far

    could roll back that update?

    LVL 3

    Expert Comment

    From the link above:

    What updates does this release replace?
    This security update replaces several prior security updates. The security bulletin IDs and affected operating systems are listed in the following table.

    Bulletin ID   Windows 2000   Windows XP    Windows Server 2003
    MS05-016   Not Replaced       Replaced        Replaced
    MS05-008   Replaced            Replaced         Replaced
    Does this update contain any security-related changes to functionality?
    Yes. Besides the changes that are listed in the "Vulnerability Details" section of this bulletin, this update includes the following changes in security functionality:

    • This security update introduces a new file, Verclsid.exe. <b>Verclsid.exe</b> is used to verify a COM object before it is instantiated by Windows Explorer.
    • This security update includes a Defense in Depth change which ensures that prompting occurs consistently in Internet zone drag and drop scenarios.
    LVL 23

    Accepted Solution

    Verclsid.exe is used to verify a COM object before it is instantiated by
    Windows Explorer, However, Verclsid.exe also breaks some fuctionality in Windows explorer.
    This program does not run always, but when it is running you are unable to expand folders in the Windows explorer tree view.  
    When you click on the plus sign next to a folder in the tree view; the busy cursor appears, but the folder never xpands.  However, if you kill the Verclsid.exe application with Task Manager, the folder(s) you've tried to expand will immediately do so the instant Verclsid.exe stops running.  And when it is not running, Explorer expands folders normally.

    Follow this recommendation:-
    1. Uninstall the KB908531 update and reboot your PC.
    2. Perform a Disk Cleanup.
    3. Perform a Checkdisk (error-checking).
    4. Download and install the update manually, then reboot.

    Security Update for Windows XP (KB908531)

    Description of the Disk Cleanup Tool in Windows XP;en-us;310312

    How to Perform Disk Error Checking in Windows XP;en-us;315265

    LVL 69

    Expert Comment

    Hello psuguru97
    If you look at clsid.exe  this related to a program called EZCLAIMS
    the VER in front I believe represents>> verify therefor it is saying it cannot verify > clsid.exe  results>verclsid.exe error.
    Would explain why it cannot run,;en-us;303089

    Expert Comment

    Re: Merete

    That is a red herring.

    Re: psuguru97

    Please take a look at this:
    LVL 69

    Expert Comment

    MS introduces this exe to validate ActiveX controls..
    This security update introduces a new file, Verclsid.exe. Verclsid.exe is used to verify a COM object before it is instantiated by Windows Explorer

    download the update here you must running a validated copy or windowsxp.

    Assisted Solution

    The regfix in the article below fixed the exact same problem on one of my machines.  Hope this helps, if not uninstall Security update 908531 as a last resort until Microsoft releases a fixed version.


     Share-to-Web software
    Warning Serious problems might occur if you modify the registry incorrectly by using Registry Editor or by using another method. These problems might require that you reinstall your operating system. Microsoft cannot guarantee that these problems can be solved. Modify the registry at your own risk.

    Security update 908531 includes an "allow list." The Verclsid.exe program does not scan any file that has an extension that appears in this list. For more information, click the following article number to view the article in the Microsoft Knowledge Base:
    908531 ( MS06-015: Vulnerability in Windows Explorer could lead to remote code execution
    To resolve this problem, you can add the HP shell extension to the list. To you do this, you must follow these steps to modify the registry:
    1.      Log on to the computer by using an account that has administrative credentials.
    2.      Click Start, click Run, type regedit, and then click OK.
    3.      Locate and then right-click the following registry subkey:
    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Shell Extensions\Cached
    4.      Point to New, and then click DWORD Value.
    5.      For Microsoft Windows 2000-based computers, type the following:
    {A4DF5659-0801-4A60-9607-1C48695EFDA9} {000214E6-0000-0000-C000-000000000046}
    For Microsoft Windows XP-based or Microsoft Windows Server 2003-based computers, type the following:
    {A4DF5659-0801-4A60-9607-1C48695EFDA9} {000214E6-0000-0000-C000-000000000046} 0x401
    6.      Right-click the value that you just created, and then set the Value data to 1.
    7.      Exit Registry Editor.
    8.      Use Task Manager to close the Verclsid.exe program or to restart the computer.

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