VoipDiscount

original: https://www.experts-exchange.com/questi ... -hour.html
https://www.experts-exchange.com/questions/24070087/Windows-Server-2003-Rebooting-every-hour.html
This was my solution:

I have found that it is COMMON among the windows 2003 servers I work on.
IF a server gets suddenly shutdown for any reason - such as power off or blue screen error ... Then sometimes the server will get into a reboot cycle where it reboots itself with NO Warning in a cyclical manner. Such as every hour or every 24 hours.

I have no idea why this happens but I know that it does happen fairly regularly.

My solution: Once you have restarted the server. Then shut it down again properly - using the Restart option. And the problem will be solved.

You can see the post here: http://www.experts-exchange.com/OS/Micr ... ml?cid=780

So to recap: I suggest that you simply restart the server via the normal Shutdown menu and then I would be surprised if the problem does not go away.

Let me know how it goes.