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Windows Update Issue and Crashing DLL files

Posted on 2014-12-11
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Last Modified: 2016-01-24
We are having an issue at our company with several computers now crashing when running programs such as Remote Desktop and playing Wave files thru Windows Media Player.  This just started today.  I am worried that an update may have caused this.  This is the error message we get when opening a WAVE file in Windows Media Player:

C:\\Windows\System32\MF.dll is either not designed to run on Windows or it contains an error.  Try installing the program again using the original installation media or contact your system administrator or the software vendor for support.

The above message will also come up with a different DLL file if you try to run Remote Desktop.  I have tried sfc \scannow and that doesn't fix it.  Any ideas?  These are Windows 7 machines.
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Question by:CCB-Tech
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by:David Johnson, CD, MVP
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its not an update but possibly malware
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by:CCB-Tech
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We have scanned several of the computers that are having this issue with several different malware/virus scanners and they turn up no threats.  It doesn't happen to everyone.  I have worked around by installed VLC player on them but I can't seem to find a correlation between the computers that have this problem and the ones that don't.  So far I have only been made aware of about 4 systems having this issue but others may not be aware of it.
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by:David Johnson, CD, MVP
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which operating system?
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by:CCB-Tech
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Sorry, Windows 7 shop here.
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by:David Johnson, CD, MVP
David Johnson, CD, MVP earned 150 total points
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hashes of mf.dll Windows 7
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by:CCB-Tech
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So how would I get to this?  Do I need to make sure these are checked?  Thanks for all your help!
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by:David Johnson, CD, MVP
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I finally found the issue that was causing this.  It was the Microsoft Hotfix KB3009736.  I think this fix was added for Itunes crashing.  It was causing Windows Media Player to crash.  After uninstalling this Hotfix, Media Player is working fine now.  Thank for all the help though!
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by:CCB-Tech
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The update was the root cause, but we appreciated his help!
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