Opening a downloaded .CHM file results in "Navigation Cancelled"

.CHM (Compiled HTML) files can represent some security risk if they come from unknown sources since they can navigate to embedded URLs without warning. As a result, Microsoft sets the default security level as "Blocked" for downloaded .CHM files.

The following steps should work to properly open a .chm file (see pictures):

1) Download the file to your desktop.
2) Right-Click on the file
3) Select the "General" Tab.
4) Push the “Unblock” button
5) Push “Apply”.

The file should work now, and can be saved to an alternate location as needed.







If the preceeding procedures do not work, please follow the troubleshooting steps in the MicroSoft Community Chat on this subject located here.


Thank you,

Richard Clark
Indusoft TMS