Remove a program on Vista that isn’t on the uninstall list?

How do you uninstall a program in Vista, if the program doesn't appear in the list of programs on the "Uninstall or change a program" panel?

See below for the details of my question.

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I was trying to install the CyberLink program PowerDirect Ultra, and installation crashed. I tried again, and it detected the old installation, tried to uninstall, and then failed, with an error message "Error reading setup initialization file."

I tried to uninstall the program by going to Vista's "Uninstall or change program" panel, but the PowerDirector program is not listed.

I do have a CyberLink PowerDirector icon on my desktop, and the program does open when I try to click on it. However, I would still like to uninstall the program, and re-install, because it seems like the current installation is faulty.

I tried to get an answer from CyberLink customer support, but have not been able to get a useful response.

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