[XP&2K3] Losing my Connections

I'm hoping you all can help me with my little problem.

I work with a company that has four WinXP Pro machines on a domain governed by a Win2k3 machine. The server handles basic domain authentication, printer serving and file sharing. Also, Symantec AntiVirus server is running.

Each morning, the folks at the office have to reboot their machines. Each computer seems to lose touch with the server, but instaed of displaying "Cannot find Network", The flashlight we all know and love runs back and forth and back and forth and back...

I've tried disabling Computer Browser, and that seemingly had no effect. Am I missing something here? What is causing this to happen. The computers are all different types, so I am wondering what the problem might be. One person actually maintains dilligence and shuts down at the end of the night, and their connection is always fine when they turn it on in the morning.

The network is being governed by a DLink DL+614 wireless/wired router.

Thanks in advance for any help you can provide me. I hope to hear from you all soon.

Well, any number of problems can can cause those symptoms.

I assume you mean you are trying to browse the file shares on the server? If you are trying to browse the Entire Network, it may be a WINS problem (if your network is using WINS).

Can the server handle all those roles at the same time (i.e. does is have enough speed and memory)? Try running the performance monitor on the server for a day or so and see what it's doing. Are there any switches experiencing contention on your network? Maybe the TP from the server is suffering from attenuation or interference?

Like I said, any number of problems can cause this and so it's hard to say what to do about it on a forum. If you find a problem and can solve it, post it - I am interested...