Act! has stopped working – APPCRASH – mscoreei.dll

Act! crash error – mscoreei.dll

When trying to load the Act! program, a crash window appears that reads “Act! has stopped working. Windows can check online for a solution to the problem.”  The problem details window lists the Problem Event Name as APPCRASH, and the Fault Module Name is mscoreei.dll

It’s always ‘fun’ to encounter a new Act! error, just when you think you’ve seen it all.  I ran into this one today, on August 8th 2017.  This occurred after running some Windows security updates.  This particular machine was Windows 7, 64-bit, running Act! version 19.2 Premium Update 3.


APPCRASH Error message shown when trying to open Act!



mscoreei.dll is a file related to the Microsoft .NET Framework.

  1. Go into the Windows Control Panel > Add/Remove Programs
  2. Find the Microsoft .NET Framework 4.5 in the list
    1. Note: Your version of .NET may be different.  It is very possible you are using 4.0, 4.6, or 4.7.  Or something else entirely.  When I encountered this error, it was 4.5.
  3. Click Repair
  4. Run the Repair utility on the .NET framework.  It may take a few minutes.
  5. Reboot the computer when finished and test.

As always, you can email if you would like to hire us to take a look at it.

Hope this helps!  Best of luck out there.

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