I have a Windows Home Server running on my home network and I lose the ability to connect to it on a regular basis. Sometime sit will stay connected for hours and lately the longest it has stayed reachable has been 5 days. This server is a fairly vanilla installation on an Acer Aspire easyStore Home Server. The only other software that is run is the Logitech Media Server.
When this condition happens, the box looks normal, the disk lights flicker occasionally, the netowkr light flickers, and the "I" is red indicating a problem. The only way to connect to the home server again is to turn it off and back on. When the server reboots everything is functional until it happens again.
I have read many many forumn posts about this condition and many have some "cure" that worked for other people which has not solved the problem here. Many people have this problem using Windows Home Server and many different hardware platforms, and many different brands of nics. One resourceful network admin added a second Intel nic to there Windows Home Server and both interfaces would go down, ususally within a coupe of minutes of each other.
Glad to provide any other information.