Help files (CHM) don't work

Published on 08 July 2008 • Estimated reading time: 1 minutes

So in Vista and/or IE8, there seems to be an issue with CHM files that you have downloaded from the Internet—they simply refuse to load their content.

I encountered this while trying to open the HMC 4.5 documentation, which was, as you might have guessed, provided as CHM help files.

To fix this:

1. Close the file.
2. Right-click it and select Properties.
3. In the bottom-right corner, you’ll find the Unblock checkbox—enable it.
4. Click Apply, then OK.
5. Now you can use the file normally.