Steps How To Hack a WiFi ( Using Windows)

It takes about 5-6 hours if the password is weak a high signal of the WiFi network you are going to hack and you have sometimes 10-12 for more complicated passwords and if the WiFi signal of the Network is weak. The time has taken also changes if the WiFi network you are going to hack has many other clients already accessing it

Packet sniffer:  Commview for WiFi ( check it website and see if ur wifi card is supported https://www.tamos.com/products/commwifi/adapterlist.php )
get the 30-day trial or use the free full version available on the net from other sites.I recommend the 30-day trial because it will be the latest after it expires y can always go to other means.
You will use this tool for capturing the packets sent and received through the Access Point you are going to hack .
The more packets you capture the better chances of cracking the password.You will need more than 1,00,000 minimum packets to crack the password.The packets will be captured in the .ncp format.You will use this tool to convert the .ncp to .cap.
NOT MANY NETWORK CARDS ARE SUPPORTED SO PLEASE CHECK YOUR NETWORK ADAPTER IN DEVICE MANAGER. IF it is not supported then there is no other option then to use backtrack with extra hardware.
Decrypter: Aircrack suite (http://www.aircrack-ng.org/)
You will use this tool to crack the password of the Access Point using the. Cap files you obtained from the Commview application.
NOTE : You will need a packet sniffing program (we will use Commview for WiFi) and not airodump-ng ( already integrated into air crack suite).Or if YOU can get another packet sniffer that support your card then use it instead of common viewer.
Step 1: Install CommView for WiFi. It doesn’t matter whether you install it in VoIP mode or Standard mode. I used VoIP. It automatically installs the necessary drivers. Allow it to install.
Note : – You will not be able to connect to any Network using WiFi when using CommView
Step 2: Click on the PLAY ICON in the Left First
wifi hack
CommView select play button
Step 3: (Choosing the Network (a) )  A new window should pop up now. Click on the START SCANNING button
Scannow
Commview scanning now
Step 4: (Choosing the Network (b) ): Click on the WiFi network you want to hack in the Right Column and Click on CAPTURE.
Note: networks .- This tutorial is only for WEP networks.
Capturing data in CommView
capturing data in CommView
Step 5: (Capturing the Packets): The windows should close now and you should see that CommView has started Capturing Packets.
sniffing
Collecting sniffing packets
Step 6: (Saving the Packets ): Now that the Packets are getting captured you need to Save them. Click on Settings->Options->Memory Usage Change Maximum Packets in a buffer to 20000.
packets buffer setting
packets buffer setting set as 20000
Click on the LOGGING Tab .Check AUTO-SAVING In the Maximum Directory Size: 5000 Average Log File Size: 50
auto save settings
auto save settings in commview
Now CommView will automatically Start Saving packets in the .ncp format at a size of 20MB each in the specified directory.
Step 7: ( Concatenating the Logs ): Since you are capturing a lot of logs you will need to concatenate them into once file. To do this go to Logging and click on CONCATENATE LOGS Choose all the files that have been saved in your specified folder and Concatenate them .
Now you will have one .ncf file.
Step 8: (Converting .ncf to .cap ): Now that you have one file with all the packets you need to Convert it into .cap file for AIRCRACK to crack.
Click on File->Log Viewer->Load Commview Logs-> Choose the .ncf file. Now File->Export->Wireshark/TCP dump format .
Aircrack Part: Now for the Second Part Cracking, this is very simple. Just open the Aircrack Folder->Bin->Aircrack-ng GUI.exe Choose the .cap file and you should be able to do the others.
Also select the encryption(WEP or others) and Key size (64). Press launch and the key will be revealed. or try other settings if not working.