Hi, what installer did you download? are you executing the installer as Administrator?
Denodo Windows-installers include the JRE, so I don't think it is a problem with the Java version... If you finally it is a permissions problem, you can try installing Denodo outside "Program Files" directory, for example in "C:/Denodo".
Besides the installer, I can also recommend to look into the Denodo Platform Installation Guide as it contains useful information about the installation process of Denodo Platform.
Hope this helps!