HOW TO CRACK/HACK WIRELESS NETWORKS

Aircrack-ng is an 802.11 WEP and WPA-PSK keys cracking program that can recover keys once enough data packets have been captured. It implements the standard FMS attack along with some optimizations like KoreK attacks, as well as the all-new PTW attack, thus making the attack much faster compared to other WEP cracking tools.

In fact, Aircrack-ng is a set of tools for auditing wireless networks.

Step 1:
Download the Latest Version of Aircrack-ng for Windows from here:
    http://www.aircrack-ng.org/
Step 2:
Extract the Zip file that you downloaded. it will be extracted to aircrack-ng-0.9.3-win Directory.(This directory name will vary based on the exact version that you downloaded.)
Step 3:
Copy the aircrack-ng-0.9.3-win directory to  C:\ Drive. This will create a directory called “aircrack-ng-0.9.3-win”.  This main directory contains three subdirectories - “bin”, “src” and “test”.
Prior to using the software, make sure to install the drivers for your particular wireless card. See this link for the instructions.
Step 4:
Oepn the Aircrack-ng GUI.exe inside “bin” subdirectory. The GUI requires .NET Framework 2.0 to run (.NET Frameworks 1.0/1.1 are not able to run this executable, 2.0 or better MUST be installed).

Alternatively, open a command prompt (Start menu → Execute → cmd.exe) and change to the “C:\aircrack-ng-0.9-win\bin” directory and execute the individual commands.

Remember that Windows only supports a limited subset of the commands.