The connection between your access point, router, or cable modem and the Internet is broken?

[rowlfe]

I'll bet you are using a wireless link and NOT a wire cable to connect to your router, yes? The problem is wireless is a party line, and something is causing interference which means you get disconnected when the router does not hear you for a while. It thinks you "hung up" and went away, so it drops the connection. It is only doing what YOU would do on a party line and did not hear from the other end for a while, you would hang up, and so does the wireless access point. The thing to do is eliminate the interference. Do you have more than one device connecting by wireless links to your router? Do you have neighbors using wireless? They count as users of the party line since they have transmitters just like you do, and when the line is busy with their traffic, YOU have to wait with everyone else for the line to clear before anyone can try to talk. The problem surfaces when more than one are waiting, and interfere with each other. They wait for a while for an acknowledgement packet, which never comes, so they try again, and interfere again, with even more dead time with no data moving. If too much dead time goes by, your wireless connection is dropped. So, the more traffic there is, the slower each user goes, until finally the delays are just too much and the connection is dropped for lack of activity. Your computer periodically sends out "keep alive" packets which are there to keep your connection open, but if the keep alive packets are "lost" through interference, the access point closes the connection because you are no longer "there".