I have ADSL line and a wireless modem and access point between my 2 PCs at
home I discovered that is my neighbor can detect the signal and use the
internet from my ADSL so please I need some help to prevent him or even
anybody else outside my house.
Thanks in advance

well, you can turn on wep or wpa encryption and/or limit access by specific
mac addresses depending on your access point.  time to get out the manual
and see what it says.

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samh wrote:

I can't do better than MS-MVP Malke (from whom the following was copied):

Here are links to help you:

Wireless - Basic Configuration -
http://www.ezlan.net/Wireless_Config.html

Wireless - Basic Security -  http://www.ezlan.net/Wireless_Security.html

MVP Barb Bowman on wireless security - http://tinyurl.com/56fc5

The six dumbest ways to secure a wireless LAN -
http://blogs.zdnet.com/Ou/index.php?p=43

You first need to determine if your hardware - all parts: the router and
the network adapter card(s) - support WPA. If one part does *not*, you
will need to either update its firmware and/or drivers or just use WEP.
You will set your router up (usually from a browser - consult the
manual) and select your encryption method and key. Most often you will
enter a passphrase to generate a key. You will not use the passphrase
again - you will enter the key on the laptop.

Cannot get wireless signal from router to laptop
TV
Connecting to router
"unsecurted network"?
Belkin wireless f7000 wont connect to router
Wireless connexion problem..
WEP encryption
Wireless Network Connection Status Icon
Windows 2000
Wireless USB "cable"