After 3 years of smooth operation, one of our servers (Windows Server 2003) started to fail at random times. No authentication, remote login or net share accesses are then possible.
Taking a look at the services list, many of the basic services such as the net logon, computer browser and workstation service are stopped. After restarting the services, everything seems to be working. Also, after a server restart, everything is working correctly for some days.
I can't think of any change that could've caused this. The server is fully updated, no viruses were found.
As there are no relevant entries in the error logs before the failure, I can't think of a quick way to locate the cause of the error.
Is it possible to log service crashs to the event log and restart the failing services automatically? What could be the cause of the malfunctions?