Random Network Drops

I have a wirless/wired network with a netgear Wg614v7 wireless g router. Connected to it are two xbox 360 consoles, a desktop pc running windows xp sp2, and a laptop running vista. All are hooked up wired except for the laptop, which has absolutely no problems.

The other three experience random internet drops. These are NOT simultaneous, one might be working while the other is stuffed. It happens 3-4 times a day and is getting really annoying. Reseting the consoles or repairing the connenction on the desktop usually fixes it, but its to late when your in the middle of an online game...

The Modem I use is a Motorola surfboard cable modem hooked up to the wouter via ethernet.

Its getting more frequent and really annoying. Can someone please help?