I have windows server 2003 with 6 windows XP clients that are constantly dropping. These dropped connections also cause a NAS to disconnect and have to be rebooted to reconnect.
So far I have tried.
1. Switching from DHCP to fixed IP addresses and turning off DHCP.
2. Disabling the resource conservation features.
3. Switching routers.
4. forcing the NICs to fixed speed settings versus auto-negotiation.
The only thing that has worked so far is logging everyone on using the administrator log on. I tried giving a user administrative priviledges but that did not work, in order to maintain the connection longer than 1 day they have to log in as administrator.