Wireless computer being used....The easiest way to fix this is to use a "wired computer". The other option is to move the lights as far away from the computer as possible.

Although it's never been talked about ( as far as I know ) I've wondered if the same thing happens with devices using either Blue tooth or ANT+. For me that's an important question to answer because I've considered the possibility of using a wireless speed sensor ( BT ) to use with a smart phone app.