I have northern 360 premier edition and I want to disable the firewall between my PC and Xbox 360. How do I disable it for just that one connection.

If you have an Xbox 360 connected to a home network that also has a Windows Media Center, you can add your Xbox 360 as a Media Center Extender device so that you can enjoy the digital media on your Windows Media Center computer by using Xbox 360. For more information, see Xbox 360 online.
1. Turn on your Windows Media Center computer and log on to Windows. Verify that your computer is connected to your home network.
2. Turn on your Xbox 360 and verify that it is connected to your home network.
3. In Windows Media Center, on the start screen, scroll to Tasks, and then click add extender.
4. On the Welcome to Windows Media Center Extender Setup screen in Windows Media Center, click Next.
5. Press the Green Start button on your Xbox 360 remote control or use your Xbox 360 controller to select the media blade.
6. On your Xbox 360, select Media Center.
7. On your Xbox 360, follow the instructions on the screen to obtain an 8-digit Windows Media Center Setup Key. Write down this 8-digit setup key. This is the key that you will use to affiliate your Xbox 360 with your computer that has Windows Media Center.
You do not need to download any additional software because the Extender functionality is built into Windows Media Center.
8. On the Enter the Setup Key screen in Windows Media Center, use the Windows Media Center remote control or keyboard to enter the 8-digit setup key that displays on Xbox 360, and then click Next.
9. Follow the steps in Extender Setup.
Several changes are automatically made to your Windows Media Center computer during the Extender Setup, including changes to the Windows Firewall settings. For more information about Windows Firewall, see Windows Firewall: recommended links. During this time, the Windows Media Center Extender service (which is named mcx2svc) starts on your computer, along with other dependent services.
If you have a firewall running on your computer that is not the Windows Firewall, make sure that the firewall software is set up to allow Xbox 360 to connect to your Windows Media Center computer as a Windows Media Center Extender. Some firewalls are already set up to allow Xbox 360 to connect to a Windows Media Center computer as a Media Center Extender. However, other firewalls will require you to make changes to how the firewall software is set up. For more information about which firewalls are already set up to allow a Media Center Extender connection, as well as information about how to set up other firewalls to work with a Windows Media Center Extender such as Xbox 360, go to the Firewalls and Media Center Extender article on the Microsoft website.
10. After Extender Setup has finished, in Windows Media Center, click Finish.
On the TV that is connected to Xbox 360, the Windows Media Center user interface appears. You can then enjoy live TV, recorded TV, pictures, music, videos, and other digital media on your Xbox 360 as you would in Windows Media Center. A new user account named mcx1 (by default) is automatically created to use the Extender.

Please see http://windowshelp.microsoft.com/Windows/en-US/Help/8076aff3-16ec-4751-9f57-d36e0ff407201033.mspx#EPD for more info.

Thanks and hope that helps!
Les

XBOX

You Will Have to Disable the Firewall In Your modem / Router

And IF it is a router then Open The Ports

• TCP 80
• UDP 88
• UDP 3074
• TCP 3074
• UDP 53
• TCP 53

And Also Make sure that UPnP is Enabled

Follow these steps :
1.
Burn CDs. The easiest way to put music on your Xbox 360 is to rip CDs from your own collection. Simply insert your favorite CD in you Xbox 360 and then pull up the secondary menu with the Xbox logo button. Then select "Rip CD" from the menu to transfer the tracks from the CD to your Xbox hard drive.
2.
Sync your computer with your Xbox 360. If you have Windows XP Media Edition or Windows Vista (any edition) and a wireless connection your computer will be able to detect your Xbox 360 and can share media with it. Simply find the "Windows Media Extension" tool on your PC and follow the prompts to stream video to your Xbox 360.

Is the router firewalled? Set Firewall to low or set firewall to allow x box through.Do this in routers homepage on your pc.

ip address should be 198.162.1.1 or 198.162.1.0

Check how many product keys are provided with the Norton 360 premier edition product. If you purchased through authorised dealer, coordinate with the vendor to get it resolved.

The only thing i can think of is that maybe the ports are wrong =S.
Try turning the firewall off just to see if it will work, go to Control Panel, Security then you get the option in a list to turn Windows Firewall Off. Prefrom thi sjust to see if it will work. PLEASE NOTE after turning the firewall off after you finish trying to connect with the xbox try turning it back on for teh computer safety.

Once you have logged into your router, enable the DMZ feature and put in the IP address of your 360.

This will put your 360 outside of the routers firewall and it will give you a full open connection to XBox Live.