Here’s a quicky that’s bugged me a few times and I can never remember the solution.
Sometimes when you download a .chm file, open it and try to navigate around you get an “address is not valid” error such as the following:
The solution is quick and simple:
- Right-click the .chm file and then click Properties.
- Click the Unblock button.
- The .chm file may now be opened and will work normally.