ActionTec dropping Wifi Connections

I have an actiontec router:

Recently, it has begun dropping Wifi connections of all the devices in my home.  I have two TV's, two BlueRay players, and several PC's that are almost always on and several other devices that connect and disconnect during the day (laptops and mobile phones).  

I have two PC's wired to the router and they seem to stay connected, but the Wifi connections all get dropped several times per day.  The router itself maintains a connection to the internet, as I can always go to the wired PC and get out to the internet, never a problem.

This recently started happening, only this week.  I checked for new firmware and there is none.

The only change I made recently was to turn all my device connections into Static DHCP so that printers all would get the same address every time they connected.