I have had the following setup for the past year and had virtually no networking problems of any sort.
1 x SKY ADSL router with wireless b&g enabled. 2 x PC's running XP and connecting via wireless 1 x laptop running vista and connectind via wireless.
All the computers have fixed IP addresses, and I can copy between them okay.
For christmas I brought a 500Gb Network drive, which I have connected to the router via an ethernet cable. This also has a fixed IP address.
I can copy any amount of data from one of the XP computers via wireless to the network drive and get no failures at all. I recently copied about 50Gb from it over night at about 500-800Kb/Sec.
If I try and copy from the other XP computer or the Vista laptop however, after a seemingly random amount of time ALL of the network connections on ALL of the computers drop out. On the router all the lights (except power) go out. I then have to power the router off and back on. When these two systems are copying it is at about 1.5 - 3 Mb/Sec.
If I then run an ethernet cable from either of these computers to the router I can then copy any amount of data without a problem.
I don't want to have to run ethernet cables all over the house, which is why I use wireless. Anybody have any ideas?