The Open Cave

When I try to install TOC, it will start the installation process and then without warning, terminate with the following message;
"There is a problem with the Windows installer package. A program run as part of the setup did not finish as expected. Contact your tech support or package reader."

Any solutions?

I would just try to install it again.
Use the directions as on forum.

What exactly are you installing and where did you get the installer from? All you should have to do is downloading and unpacking the archive from the homepage.