Article ID: 938803 - View products that this article applies to.
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Important This article contains information about how to modify the registry. Make sure that you back up the registry before you modify it. Make sure that you know how to restore the registry if a problem occurs. For more information about how to back up, restore, and modify the registry, click the following article number to view the article in the Microsoft Knowledge Base:
(https://support.microsoft.com/kb/322756/ )How to back up and restore the registry in Windows
This article describes how to disable CAD .dwg files after you install Microsoft Office Visio 2003 Service Pack 3 (SP3) or Microsoft Office Visio 2007 Service Pack 2 (SP2). The solution also applies to Visio 2010 and Visio 2013, and no Service Pack is required for these versions.
Warning Serious problems might occur if you modify the registry incorrectly by using Registry Editor or by using another method. These problems might require that you reinstall the operating system. Microsoft cannot guarantee that these problems can be solved. Modify the registry at your own risk.
After you install Visio 2003 SP3 or Microsoft Office Visio 2007 SP2, you can disable the use of .dwg files in Visio 2003 and higher. You may want to disable .dwg files in Visio to improve the security of Visio files.
When you disable .dwg files, the following behavior occurs:
(http://go.microsoft.com/fwlink/?LinkId=151500)for other considerations.
Article ID: 938803 - Last Review: January 16, 2015 - Revision: 4.0