Error Code 0x8000ffff when trying to un-register the codec file iac25_32.ax from the Command Prompt (cmd.exe)

Question

Error Code 0x8000ffff when trying to un-register the codec file iac25_32.ax from the Command Prompt (cmd.exe)

Anonymous

My Windows DVD Maker seems to crash after i click the "Next" button, so i searched in my Event Viewer to get more details. I encountered that a faulting module named "iac25_32.ax" is the source of my problem. So in order to remove it, I went to my Command Prompt (cmd.exe) and entered the following text: "regsvr32 iac25_32.ax /u" to try and un-register that codec file.

Here is where my problem occurs: Once I hit enter, I receive an error code reading - 0x8000ffff. Why won't my command process?

Error code specifics : The module "iac25_32.ax" was loaded but the call to DllUnregisterServer failed with error code 0x8000ffff

How do i resolve this error code 0x8000ffff?

Locked Question. This question was migrated from the Microsoft Support Community. You can vote on whether it's helpful, but you can't add comments or replies or follow the question.

0 comments

Answer accepted by question author

4 additional answers

Answer 1

Note that attempting to unregister a DLL that is not currently registered produces an error dialog such as the following no matter which version of Visual J++ was used to create the DLL:

RegSvr32

DllUnregisterServer in ...\Project1.dll failed.

Return code was: 0x8000ffff

FIX: onCOMRegister Not Called for VJ-Generated COM DLLs

http://support.microsoft.com/kb/223339

Did you ever try registering that file?

"iac25_32.ax" is a MPEG-4 DVD Filter as it is not a .dll, or not an .ocx file, maybe it cannot be registered or unregistered in any case, but other seem to suggest it so it might be possible?

windows dvd maker has stopped working

http://social.answers.microsoft.com/Forums/en-US/vistamedia/thread/98fde193-d4e6-417f-8b37-16661e6c6a3a

These are some Codec links.

Vista Codec Package v5.4.3 Final

http://www.majorgeeks.com/Vista_Codec_Package_d5326.html

Basically, the K-Lite Mega Codec Pack will play every video file on this planet.

K-Lite Mega Codec Pack

K-Lite Codec Pack Full (Less features)

K-Lite Mega Codec Pack 5.6.1

http://www.free-codecs.com/download/K_Lite_Mega_Codec_Pack.htm

Answer 2

Hi Linney,

After following your advise on unchecking any faulty codecs...I first unchecked any codecs that did not look familiar and saw no results from it. So then i unchecked all except AVI Compressor and still didn't see results. Are there any other default Codecs that should be left checked (such the AVI Compressor)?
Also, after exploring the "Explanation of Regsvr32 usage and error messages" link i encountered these three similar issues occurring with my original problem:

Dllname is not an executable file and no registration helper is registered for this file type.

Dllname is not an executable file (.exe, .dll, or .ocx). For example, typing regsvr32 autoexec.bat generates this error message.****

Dllname was loaded, but the DllRegisterServer or DllUnregisterServer entry point was not found.

Dllname may not be exported, or a corrupted version of Dllname may be in memory. Consider using Pview to detect the file and remove it.

Dllname is not self-registerable or a corrupted version is in memory.

For example, typing regsvr32 icwdial.dll returns this error message because the Icwdial.dll file is not self-registerable. If you suspect a corrupted version of <var>Dllname</var> is in memory, try restarting your computer or re-extract the original version of the file. If you are running Windows NT, you may need to use the Kill or Pview tool from the Microsoft Windows NT Server 4.0 Resource Kit . For additional information, click to view the following article in the Microsoft Knowledge Base:

197155 (http://support.microsoft.com/kb/197155/ ) How to kill an orphaned process

Answer 3

Hi Halima,

I am actually quite not sure if their have been any recent changes...please elaborate on the meaning of "recent changes"? (do you mean if i have all the recent updates?)

I am not fully sure if I do contain any third party CD/DVD burning software. I did check some other blog explaining about a third party CD/DVD burning software but the results were negative. (meaning i must not have a third party software)

Answer 4

If unregistering and reregestering from the "elevated" Command Prompt fails to work see if you can uncheck any faulty codecs via this.

To see if there are problem with Codecs in DVD Maker you have to load MOVIE Maker and go to the Tools/ Options/ Compatibility Tab to check out the Codecs ALSO being used in DVD Maker. Do not remove the AVI Compressor.

windows dvd maker has stopped working

http://social.answers.microsoft.com/Forums/en-US/vistamedia/thread/98fde193-d4e6-417f-8b37-16661e6c6a3a

Explanation of Regsvr32 usage and error messages

http://support.microsoft.com/kb/249873#appliesto

Error Message When You Run Regsvr32.exe on 64-Bit Windows

http://support.microsoft.com/default.aspx/kb/282747?p=1

Answer 5

Hi Iv_marquez,

• Have you made any recent changes on the computer?

• Do you have any third party CD\DVD burning software installed on the computer?

Iac25_32.ax is a part of Windows.

Some commands that you can run using Command Prompt might require elevated or administrative privileges. To run these commands, you can use the Run as administrator command:

1. Click the Start button.

2. In the Search box, type command prompt.

3. In the list of results, right-click Command Prompt, and then click Run as administrator. If you are prompted for an administrator password or confirmation, type the password or provide confirmation.

Hope this helps!

Halima S - Microsoft Support.

Visit our Microsoft Answers Feedback Forum and let us know what you think.

Share via

Error Code 0x8000ffff when trying to un-register the codec file iac25_32.ax from the Command Prompt (cmd.exe)

4 additional answers