This was a good recent read about the usual suspects that interfere with your wireless networks and a few new ones that are always good to know about. If you have WiFi issues it is worth the time. Read more: What’s killing your Wi-Fi? | Analysis | Features | PC Prohttp://www.pcpro.co.uk/features/367672/whats-killing-your-wi-fi#ixzz1NthhtFdB
I recently begain using inSSIDer 2 to troubleshoot WLAN networks, primarily because I am running Windows 7 on 64-bit machines and this one works very well with that. MetaGeek has done a nice job and I suppose it was time I upgraded from NetStumbler.