In order to play on Xbox Live one only has to connect their Xbox to a wireless network. An Xbox can be connected to a network through the settings on the device. If there is no router available an Xbox can be connected to a Windows computer and use that computers internet access.
Well what you really need to connect to Xbox Live is a modem that can transfer internet reliability.
xbox wont connect with any other hardware besides a computer and the xbox wireless usb so use the 3g wireless usb in a computer and then use an Ethernet cable from the xbox to the computer then use a video from youtube http://www.youtube.com/results?search_type=&search_query=xbox+360+connected+to+computer+internet&aq=f
to connect to xbox live you need a router or a modem
Yes, you just need a network for Xbox Live to work.
You cant connect to Xbox Live through your PC. You will need to connect straight into your modem, or either use a Microsoft Xbox 360 wireless adapter to connect through your wireless network.
if you mean can it connect to xbox live then yes. so long as you have the hard drive. you will also need a router, and the xbox to be connected to that.
Yes
yes, it can.
No, what i did is i took the ethernet cable that came with my xbox, connected it to my laptop, and connected my laptop to the internet via wireless router. The only other way that doesn't involve a wireless adapter for your 360 is to connect your 360 to your computer via an ethernet cable (not sure if you need a router for this but i might as well list it), but the laptop-connect is the "most effecient/cheapest" way, and the adapter-connect is the "best connection/signal" way.
Firstly, get your network status on the Xbox 360 network settings. This will tell you if connected or not etc. If you know its the update, you can go onto the xbox website and download the update manually. There will be a installation guide to apply the update.
You can earn achievements while not connected to XBOX Live and your console will keep track of your gamerscore locally. However, your gamerscore will not be reflected on xbox.com or on any other console until you connect to XBOX Live.