NetStumbler allows you to detect Wireless Local Area Networks (WLANs) using 802.11b, 802.11a and 802.11g. You can use it to verify that your network is set up the way you intended, find locations with poor coverage in your WLAN, detect other networks that might be causing interference with your network etc. Note that this program requires MFC71.DLL to run. Download the installer and install to the default folder C:Program FilesNetwork Stumbler. Then copy all files (except uninst.exe) to a folder of your choice. Also copy nsndis5.sys and nsndis50.dll from C:WINDOWSSYSTEM32 to the same folder. Finally, uninstall the program. Launch the program by double-clicking NetStumbler.exe.