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Error: "Act! has stopped working" when trying to use the Documents tab, open history attachments, or when trying to attach a file to a note after running Windows Updates on or after January 26, 2016

Category: Act!
18 February 2016
Answer ID 38261   |    Updated 02/11/2016 04:08 PM






Symptom: Windows updates were applied to my computer on or shortly after January 26th, 2016 and now when I try to use the Documents tab, open history attachments, or try to attach a file to a note, the Act! program crashes with the Error: "Act! has stopped working".

Product Details:
Product Family: Act!
Product:  Act! Pro, Act! Premium
Version: v16, v17

OS:  Windows 7
Third Party:  Microsoft .NET Framework



On January 26, 2016, Microsoft released an update in their Windows Updates for the Microsoft .NET Framework which updated Microsoft .NET to version 4.6.1. This update has been known to cause issues when trying to interact with the Documents tab, modify attachments, or attach new files to the database.Solution:

Act! v17
For Act! v17.1 and v17.2 hotfixes were released for a similar issue when using Act! in Windows 10. The same fixes have been known to resolve the issue in computers which are not running a Windows 10 operating system. You can find downloads for the hotfix that applies to your version here:


For Act! v17.0, it is necessary to update to v17.1 or v17.2, then apply one of the hotfixes above.

Act! v16

Note: This information is provided as a convenience. Swiftpage does not provide support for Microsoft products. If you require assistance configuring or troubleshooting Microsoft .NET Framework, contact Microsoft or an IT Professional for assistance.

In Act! v16, this issue can be resolved by removing the Microsoft .NET Framework 4.6.1 update. For additional information on removing updates, refer to the following Microsoft documentation:

Remove an update

Once you have uninstalled .NET Framework 4.6.1, it is necessary to uninstall and reinstall Act!. For information on how to uninstall or install Act!, refer to the following knowledgebase articles:



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