If an HTML Help (CHM) file is located and accessed from a network computer or from a shared network folder, it can be blocked by Windows security policy. As a result, HTML Help Viewer will display a message such as "Navigation to the webpage was canceled" or "This program cannot display the webpage" instead of the actual content.
Change the destination directory of your CHM file to a directory on the local computer.
Remark: It is recommended that HTML Help (CHM) files to be located and accessed from a local hard drive. If you need your users to access the help system through network, you can consider using the Web Help format instead of HTML Help.
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