If you do not see signal from your router, it means that the signal is not strong enough an you need to get a wireless extender or a better router.
Blocking a computer at the router wont stop that computer from seeing networks. It will only stop you from connecting. If you cant see any networks, download netstumbler.
i got a d-link wireless router but i dont now how to set it up
Yes. There are loads of different ones on the market, from internal ones to external ones. Personally I recommend external USB ones. Internal ones are good too, but take up a PCI slot thatcould be given to something more worthwhile. Most home users cant install them. And, if and when you get a second desktop, you cant share the device.
You need to make sure that your new computer has a wireless adapter, or it's connect to the router with a lan cable.' If your computer does have a wireless adapter, make sure that it's on, and its settings are default. If you have firewall make sure that it does allow required network activity. If you are using a hidden type of router, you need to make sure that your wireless adapter is configured properly.
There are tons of reasons. Most common are secured wireless is enabled, MAC table is enabled, your wireless adapter is not compatible with your wireless router, wireless router does not work properly and so on.
There are only some types of computer that will connect to certain types of wireless networks. Notebooks can connect to wireless networks like laptops do; just make sure your router is picking up signals and that its appearing on your notebook.
it needs some sort of wifi connection to a wireless router
you'll probably just need to configure your router. make sure you've set WEP as protection for your wireless.
if you have the new xbox you can if u got the original 1 u cant
you can, or at least you should. maybe you need a new one? or a new modem
If you have a wired Router you can plug the Ethernet cable into the back, otherwise you cant
If you have changed DHCP ip range, the ip address for your router has changed too. You can find your router ip address in your wireless adapter information.