You'll need a piece of software like 7zip or winrar to open up the file from the downloads page. 7zip is free and is available from http://www.7zip.org.
Ok, the file you just downloaded has a .RAR extension. You have to open that file, and then drag-and-drop ALL of the files out of there into the same folder on your computer somewhere.
Then you want to run the Viking360 Installer.msi.
Ok at that point are you still having troubles or?