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Solution to chm file navigation to the webpage was canceled error

Most of the windows Help documentation files use the “Compiled HTML Help” file (.chm) format. For example, PHP manual. But when you open a .chm file you will most likely to see the error message “Navigation to the webpage was canceled”, instead of the help content. and if you go to file properties you will see the following warning message.

This file came from another computer and might be blocked to help protect this computer.

Do the following steps to fix the problem

  1. Right click on .chm file and click properties from the menu.
  2. Under the security section, Click unblock button.
  3. Click OK to apply changes.

Now Open the .chm file again. This time you should see the help content instead of error message  Navigation to the webpage was canceled.