I have a Windows Server 2003 R2 64bit server running Exchange 2007. This server has been running fine until early November.
What's been happening is that the server will become completely unresponsive for anything between 2 and 15 minutes every 15 minutes or so.
The current running application's window updates, until I click on anything, then it will hang with everything else.
If I use Process Explorer, I can see that everything becomes very quite and max CPU usage is 0.77%. When the server wakes up again, IO, CPU etc becomes active again.
I suspected a dodgy update, so I rolled all updates back to prior to 1 November 2011, but still the same issue. I've disabled Auto update, same issue. I've used CCleaner to cleanup registry, fixed issues, but same issue. Removed ESET NOD, same issue.
Nothing is logged in Event Viewer, so I'm shooting in the dark here.
Can anyone help here?