Opening downloaded HTML files does not work

If you cannot open HTML Help (CHM) files after downloading them, use one of the following methods:

Method 1

  1. Double-click the .chm file.
  2. In the Open File-Security Warning dialog box, click to clear the Always ask before opening this file check box.
  3. Click Open.
Method 2
  1. Right-click the .chm file, and then click Properties.
  2. Click Unblock.
  3. Double-click the .chm file to open the file.

For more information, refer to Microsoft Knowledge Base article 902225.