Cannot open CHM file in Windows XP/Vista- Navigation to the Webpage has been cancelled.

When I try to open CHM file on Windows XP or Windows Vista, it always display a message “Navigation to the Webpage has been canceled.“.

Finally I have worked out how to resolve this problem.


Right click on the .CHM file
Click on “Properties
then choose the “General” Tab
At the bottom of that tab, you will see something like

Security: “This file came from another computer and might be blocked to help protect this computer
Click on the “Unblock “button which is beside to this message.
Click “OK
You should be able to view that CHM.File now

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