I've been having this problem for the last few weeks, and I can't figure out whats going on. First of all, I have an Asus A8N-E motherboard and I'm using the onboard network adapter with NVFirewall turned off. About once a night my desktop's network connection starts acting really... weird. I stop being able to access anything new across the network, be it internal or on the internet. *But*, current connections seem to work, at least for a while. I often stream video off my HTPC, and the stream will continue uninterrupted for about one minute. At that point, any working connections break off, but somehow, perhaps coincidentally, after that the network works properly again. At first I thought it was a router issue (I have a WRT-54G v4 running Thibor), but I know my laptop, which connects wirelessly, works properly when my desktop is going crazy. I suppose it could be related to the switch, but so far I haven't successfully tested it conclusively one way or the other. But, the WRT-54G recently replaced my D-Link router that seemed to be causing me similar problems. When I was using that router, the connection would drop completely (ie, I'd get the windows error message saying the network cable had been unplugged, when it had not been). A similar problem to what I'm experiencing now, but not quite the same. I'm going to continue trying to test the switch, but so far I haven't gotten my laptop set up in time when my desktop starts having problems. By the time I get it set up, the problem is resolved (it takes 1-2 minutes). In the meantime, has anyone else had a similar problem?