No. The hardware exists but has no drivers nor software to make it work.
Your computer is saying that you still have the connection when you don't actually (sometimes they do that), or your ISP has revoked your Internet access (but not the connection itself) for some reason.
Try installing drivers for this device. Also try reformatting your PC. If it still doesn't work, consult a hardware PC technician.
I use to have this problem all the time on my laptop. Eventually we had to switch providers. You can try making sure you are receiving a connection and then diagnose the connection. That should tell you what is wrong. Depending on what the answer is will determine what you need to fix. Try seeing if your IP address is still functioning. If you have another computer with internet access, you could probably go to your internet provider's website and get on a help chat desk to talk live with someone.
No because iTunes uses the Internet, so it will not work if you have no connection!
Most apps will still work if your internet connection is down.
If you want to have cable or phone modem (internet, in order to use wireless internet you still need a provider) you need to have a contract with one of internet providers. The only exception is mobile phones with internet feature activated (I'm not sure if you can connect a wireless router to it).
yes if you have internet connection
Yes, although it will be slower than broadband. You will still need a modem and some sort of connection from your modem to your computer.
Even if you found a way to connect it is would not allow the Laptop to work and only serve as a HDTV for the PS3. You would not be able to use the laptop to influence the game play. The PS3 would still need the power source and controller and you would still need a separate WiFi or Ethernet internet connection for online play. You would merely be using the A/V output of a PS3 to connect and play on your laptop
Yes, but you still have to pay for the connection.
Yes, you can. But you still need to have a wireless internet connection.
Yes, This is for adding a wireless antenna to a desktop or laptop computer that does not have wireless built in. You still need a wireless router connected to your internet provider.