Symptoms

After an Internet Explorer update, when viewing your CHM documentation, Microsoft's HTML Help Viewer isn't showing anything in the topic's contents.

Solutions

The update process might have caused problems with some files registration. You can try to register them manually from the Start / Run prompt by entering each of these commands:

• regsvr32 %systemroot%\system32\hhctrl.ocx <press the enter key>
• regsvr32 %systemroot%\system32\itss.dll <press the enter key>