I've inherited a Windows Server that is used as the backup server for some of our internal machines. One day, seemingly at random, it stopped responding to ping and no longer accepts RDC requests. I can physically log into the box, access it via UNC, and backups are still getting created, but for some reason ping/RDC are hosed.
If it helps, trying to ping it yields the following:
Reply from 10.100.---.---: Destination host unreachable.
Edit: I found this in the event log (related?):
The WinHTTP Web Proxy Auto-Discovery Service service depends on the DHCP Client service which failed to start because of the following error: The service cannot be started, either because it is disabled or because it has no enabled devices associated with it.
Any suggestions on what might be the problem or where I might start looking?