We have a new HP ML110 G6 server with an Adaptec 1220SA RAID controller that we have just installed Windows Server Standard 2008 on to. It is joined to the existing domain, which runs an ISA firewall.
The server drops randomly during the day, at which point we can ping it but not do much else. Looking at the screen, it looks like the standard Windows Server 2008 logging in screen, but it just says 'Waiting...' - that's it. We have to switch off and reboot the machine for it to function again.