This adapter didn't come with any directions? What is the brand and model of the adapter? It sounds like you are missing the device drivers for the adapter. Look on the manufactures website for drivers and possibly a manual. Read the instructions on how to install the adapter and drivers. This...
You have to use a router to port forward. In the router's setup, look for port forwarding and set the incoming/outgoing port number to your computers IP address. This will allow your router to send the right info to the appropriate computer. Go to start, run and type cmd. In the command prompt...
whether the same may be used ? Used for what?
A crack is a program that generates a product key. A serial has the product key. A torrent is a file that you download.
Just unplug the cable from you pc and plug it into the xbox.
Now if you want to use both for internet access you need a router.
Or you can set up internet sharing connection with the pc and the laptop, but that is a pain to do you it doesn't always work well.