These downloads -- most of them free, and none of them expensive -- will make managing your small network much easier
Network Magic Essentials and Network Magic Pro
Spiceworks IT Desktop
Bandwidth Monitor 2 Lite Edition
LAN Speed Test
Xirrus Wi-Fi Inspector
Technitium MAC Address Changer
Find MAC Address
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The free InSSIDer 2 from MetaGeek helps solve this thorny problem. It searches out every wireless network in an area, shows the signal strength of each, and shows the channels that each one uses. That way, you can determine whether a nearby network might be generating interference, and change your channel.
You can also walk around your office or home with InSSIDer on a laptop, and see the signal strength in all locations, to find dead spots. Then you can solve the problem either by moving your router or by moving the PC from the poorly served location.