APPCRASH after update to 2015 - mfc100u.dll

I just upgraded our computers from 2014 Individual SolidWorks licenses to 2015 Network Licenses.

One of the computers now has this error message whenever SolidWorks is shut down after working on a file.

It was working fine before the update.

How do I fix the issue?

I did a reinstall of 2015 SolidWorks and that did not fix the problem.

I did a sfc /scannow to check the system files & that came back OK.

==== ERROR MESSAGE =======================================

Problem signature:

  Problem Event Name: APPCRASH

  Application Name: sldworks.exe

  Application Version: 23.1.1.2

  Application Timestamp: 548dc133

  Fault Module Name: mfc100u.dll

  Fault Module Version: 10.0.40219.332

  Fault Module Timestamp: 4e1aac19

  Exception Code: c0000005

  Exception Offset: 000000000029094d

  OS Version: 6.1.7601.2.1.0.768.3

  Locale ID: 1033

  Additional Information 1: 2cd2

  Additional Information 2: 2cd2426a078a3a0e74593856b20d3863

  Additional Information 3: 8f76

  Additional Information 4: 8f763dc13297804542cd60f634848e75

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