Problem with Updating Driver Arduino Uno

I recently bought one and read through the installation process on the website "Getting Started". I downloaded Arduino 1.0.5-r2 program to run it and when I try to install the device onto my Windows 7 Home Premium conputer it fails, I know its supposed to fail. But when I go into my System folder in Control Panel and then to Device manager, I cant find the device or its drivers. All I get is a "Unknown Device", and when I click on it and look for drivers myself, named "Arduino UNO (COMxx)"...nothing and I cant even find the Ports portion in the manager of the Unknown Device. I cant find a thing.I looked at the screen by screen shot of the Update driver process, and I dont have the Ports portion(COM & LPT). Any help would be great thanks.