I recently had to reinstall Windows XP Professional (SP2) onto a Dell Dimension 8250. I am slowly adding back all the software and hardware that was running on the machine. I just installed my PCI Serial card that gives me a couple of serial com ports. It installed just fine using the attached installation disk. However, the devices I connect to the serial ports only have options to select Com ports 1-4. Consequently, when I connect the external devices to the Com ports, the computer does not "see" them. So, I accessed the Device Manager, Ports and selected the NetMos PCI Serial Port. I selected Properties, Port Settings, Advanced. An information box pops up informing me that I must have write privileges to the registry for this device in order to modify this device's advanced features. I am logged in as Administrator on my machine and should have full access (there are no other users). I'm hopeful someone can help me gain access to the Advanced features of the card so I can change Com Port assignments.