This morning I have a problem with network drive on all computer. It said 'Microsoft Windows Network : invalid descriptor' when i click on it. I tried to reconnect with Net use but I have same message with system error 6. I search for it but nothing. My server is Windows 7 pro and was up and running for at least 5 years. Everything seem to be ok on server. Going on Internet work fine on it. I uninstall antivirus on server, repair tcp stack and tried so many thing. No Windows update was made last night.
What I can do to locate the problem and solve it?