On my winbox, every once in a while I will 'disconnect' from the network. The connection says it is connected. but I cannot do anything network-related. This is fixed by using the repair thingy on the popup menu of the connection, but it is kinda annoying while playing games.

Any ideas?

PS. I have the latest drivers.

Hmm, weird.

This happened to me when I used the wrong power supply on a network switch. It would continually die and come back. Eventually the thing overheated and died. :)

This happened to me with my USB wifi adapter.  Switching to PCI fixed it.