Accessing CHM Files

Microsoft has incorporated a very annoying security patch that prevents the compiled help module (CHM) files from executing when you download them from the Web. When you download the documentation files, the symptom is that the system asks if you want to open the file. When you select Yes, then the topics show as not being displayable. The following procedure explains how to correct this problem on XP:

1. Right click on the file in Windows Explorer and select Properties from the context menu.
2. Click the Unblock button on the General tab, as shown in the following image.

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Last updated December 5, 2010