Windows 7: Serial ports problem.

Hi!
I need to access or rather edit my serial port system for a electronics platform I'm using via USB.
In the "getting started"-information fr.o.m. the homepage of the platform it says:
-Plug in your board and wait for Windows to begin it's driver installation process. After a few moments, the process will fail, despite its best efforts
-Click on the Start Menu, and open up the Control Panel.
-While in the Control Panel, navigate to System and Security. Next, click on System. Once the System window is up, open the Device Manager.
-Look under Ports (COM & LPT). You should see an open port named "Arduino UNO (COMxx)"
-Right click on the "Arduino UNO (COmxx)" port and choose the "Update Driver Software" option.
-Next, choose the "Browse my computer for Driver software" option.
-Finally, navigate to and select the Uno's driver file, named "ArduinoUNO.inf", located in the "Drivers" folder of the Arduino --Software download (not the "FTDI USB Drivers" sub-directory).
Windows will finish up the driver installation from there.

(arduino.cc - getting started - windows)

The problem is that I can't find any option for ports in device manager, and I'm afraid my windows is limited in some way. How can I check on that and can I "unlimit" it?
I'm running a Fujitsu pc with win 7 home prem 64-bit

Thx