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We have a customer that hosts our .NET application server on Windows Server 2003 x64. The problem is, its file sharing gets totally disabled after about 10-30 minutes. The only way to re-enable it is to restart the server but the same thing happens again after each restart. This server contains SQL Server 2005 Enterprise, .NET Framework 3.5 and our .NET based application server. We haven't had such a problem with any other customer before so we asked them to prepare another server to deploy our application on it. We installed our application server on the new machine and let SQL Server remain on the old one. Unfortunately the same problem happened to the new machine too. Now the old machine works only as database server and the new one works as application server but both of them have the same file sharing problem. File sharing on both machines doesn't get disabled on the same time but it eventually happens to both of them.

I wonder why is this happening and how to find the reason to this problem. Any suggestion or solution is much appreciated.

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Does restarting the "Server" service fix things (the service that hosts file sharing)? (This should help isolate the problem. –  Richard Apr 11 '10 at 9:03
    
@Richard: Unfortunately only restarting the entire machine solves the problem. –  redclover Apr 11 '10 at 10:42

1 Answer 1

I haven't experienced this problem myself, so I can only offer fairly generic advice... no offence if I ask you about something that you consider blatantly obvious...

Installed latest Service Pack for Win2003, and all updates from Windows Update?

Checked the eventlog for anything related to the Server service?

Does stopping and restarting the Server service re-enable sharing?

Is this machine part of a domain, and if so, what GPO policy settings are being applied?

From a command prompt, what does NET FILE and NET SHARE show you before and after the sharing stops?

Does NET VIEW \\MACHINENAME show the fileshare names on the local server when clients cannot access the file shares?

Is any firewall software installed or running?

Any antivirus software installed? (unlikely to have any affect, I know, but worth being aware of what is installed)

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Restarting the server service doesn't solve the problem, only restarting the machine does. And there are no firewall or antivirus involved. But i have no idea about the other points you mentioned. Thanks a lot, I'll make sure to check them all. –  redclover Apr 11 '10 at 10:45

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