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Q: Windows Media Player ( Answered 5 out of 5 stars,   1 Comment )
Subject: Windows Media Player
Category: Computers > Graphics
Asked by: zaynab-ga
List Price: $15.00
Posted: 10 Jul 2003 04:16 PDT
Expires: 09 Aug 2003 04:16 PDT
Question ID: 227353
Hi There,

I'm running Windows 2000 Professional and Windows Media Player 7.0.

Whenever I try to play something in Windows Media Player, I get a
dialog box that says:

"mplvpx.dll cannot be loaded.  OS reports: The specific module could
not be found."

If I click OK, I get another dialog box that says:

"Error Code = OxFFFFFFFB"

I've already downloaded and installed Windows Media Player 7.1. The
same thing happens.

Any ideas?
Subject: Re: Windows Media Player
Answered By: theta-ga on 10 Jul 2003 10:14 PDT
Rated:5 out of 5 stars
Hi zaynab-ga,
     Reinstalling Media Player will not be of any help, since
mplvpx.dll is not part of WMP. It is part of the Ligos MPEG decoder,
and could have been installed on your computer by other software
applications such as Ulead Video Studio, DVDIt!, Sonic MyDVD etc. This
missing dll problem usually occurs due to improper installation or
uninstallation of the decoder. If your problem also started after you
installed or uninstalled some software, it would help if you could
provide it's name. Most of the software vendors provide a fix for this
     The WMP Mini FAQ also mentions this problem with Ligos MPEG
decoder files. See .

  For a simple fix, you can download mplvpx.dll from the Dll-Files
    [ ].
  Copy the file to your System32 folder, or the Windows Media Player
folder, and it should work fine.

  You can also find the Ligos MPEG Decoder files as part of the many
Codec packs available on the internet these days. Some such codec
packs are:
   - Tsunami Codec & Filter Pack
   - ACE Mega CodecS Pack 
Once you download and install the Ligos decoder, the problem should be

Try out the above suggestions, and tell me if they help.  
If you need any clarifications, just ask.

Google/Google Groups Search Terms Used :
Ligos MPEG Decoder install

Request for Answer Clarification by zaynab-ga on 11 Jul 2003 01:27 PDT

I think you answered the question quite well.  I also assume that, if
I re-install Windows 2000 Professional from the Recovery CD and then
re-install all other programs, this problem will be resolved. 



Clarification of Answer by theta-ga on 11 Jul 2003 05:09 PDT
Hi zaynab-ga,
  Reinstalling Windows 2000 will not make any difference, since the
file in question is not part of the operating system(or the Media
Player). If you did not install the Ligos decoder on your system, then
it was probably installed by one of the other applications you
  If you have been able to figure out which application installed
Ligos on your computer, then re-installing that application should fix
the problem. Otherwise, you can try the solutions mentioned in my
previous post.

Hope this helps.
If you need any clarifications, just ask!

Request for Answer Clarification by zaynab-ga on 11 Jul 2003 06:01 PDT
Hi Theta-ga,

OK.  I see what you're saying.  I'm pretty sure that the problem
happened when I un-installed Ulead Video.

If you have any suggestions for this other than what you've already
told me, please let me know.  If not, I'll rate the answer.

By the way, I understand that Rating the Answer is the way to get you
paid.  Is this true?  This is a little confusing.  It would be good if
your employers would put a button that says something like "I accept
this question and want to pay for it."


Clarification of Answer by theta-ga on 12 Jul 2003 10:33 PDT
Hi zaynab-ga,
   I am sorry I was not able to reply to your clarifications request
earlier. My net connection is going through a bad time. :-(
   You can try reinstalling Ulead to see if it solves your problem.
Another option is to just install the Ligos MPEG codec from the codec
packs I mentioned previously.
   As for your other query, it is not necessary for you to rate the
answer for us to get paid. Once a researcher posts an answer to the
question, he/she gets paid, as long as the customer is satisfied with
the answer and does not ask for a refund. Of course, as researchers,
we always look forward to the customer's rating and comment, as they
enable us to measure how satisfying/useful they found our answer.
   Which reminds me...Thanks for the 5 star rating! Glad I was able to
help. :-)
zaynab-ga rated this answer:5 out of 5 stars

Subject: Re: Windows Media Player
From: billjames310-ga on 27 Jul 2003 09:25 PDT
The Ligos MPEG Decoder can also be installed using the K-Lite Codec
Pack from the Kazaa Lite web site,  You need to
download the Full version, which is a 8 MB, but the good news is you
don't have to install everything.  During the setup you have a choice
of what components to install, just deselect everthing but the Ligos
MPEG-2 codecs.  Besides the codec you get a small configureation
utility for use if you need to customize settings, but the defaults
seem to work OK for me.

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