Q: Canon MP Navigator Stopped working with scanner. Worked under Vista, not Win 7. This thread is locked from future replies

Canon scanner Lide 200 worked fine in Vista 64.  I upgraded to Win 7 64 and the interface software stopped working - "MP Navigator EX has stopped working".  It is a BEX error, Fault module MSONSEXT.DLL_unloaded.  I uninstalled, downloaded the newest and reinstalled, same problem.  Canon had me create a new profile, program works in that profile.  Canon says it is a rights or OS issue. 

The scanner works with other software.  MP Navigator is a resident program to do copies or copy and email, etc.

Here is the detail from the windows error

Problem Event Name:    BEX
  Application Name:    mpnex20.exe
  Application Version:
  Application Timestamp:    488d25b8
  Fault Module Name:    MSONSEXT.DLL_unloaded
  Fault Module Version:
  Fault Module Timestamp:    43306199
  Exception Offset:    49143a3b
  Exception Code:    c0000005
  Exception Data:    00000008
  OS Version:    6.1.7600.
  Locale ID:    1033
  Additional Information 1:    0f31
  Additional Information 2:    0f3137665bbf0bb676c8a16f3fa76e52
  Additional Information 3:    fff8
  Additional Information 4:    fff84cbc2f915b8472e90c61e476efef



I have had the same problem with Win 7 64. I spoke to Canon Tech Support and after an hour during which we tested various things I was told the the problem was with Windows and I should contact Microsoft. I tried creating a new profile which fixed the problem for about a week, then it came back again! The issue may be associated with Windows Update but I am not sure. On this last go around I created a new profile, then copied in the folders and files from the corrupted profile one at a time to see when the problem would start again. After carefully copying files, backing up, testing Mp Navigator, and if necessary restoring the last good setup I discoved that the following file was causing the problem:

C:\Users\<user name>\App Data\Roaming\Microsoft\Windows\Network Shortcuts\My Web Sites on MSN

Note: This file was not present in my new profile. Also, the icon has the shortcut marker on it, but explorer says it is a folder. There is no file extension.

I eventually copied ALL of the other data from the bad profile to the new one and MP Navigator still worked! I then deleted the offending file from the bad profile and MP Navigator started working there too!

I then reconfigured all of my software and started IE etc. for the first time while watching the Network Shortcuts folder. The offending file has not reappeared yet. I made a shortcut to this location so I can keep an eye on it to see when it appears again.

Hopefully someone at CANON or Microsoft will fix this "corrupted" profile issue.


David Witteried

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Hey GregDaro,

Thanks for posting in Microsoft answers!

The issue could be related to a corrupt user profile, since you’ve stated in your post that the program works fine in the other profile you’ve created.

Refer the link below for more details on fixing a corrupt user profile:

Fix a corrupted user profile

Hope this helps!
Gokul – Microsoft Support.

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Views: 141488 Last updated: February 6, 2018 Applies to: