I could find no reason why these events were being logged in the first place and the server had been completely rebooted a few hours beforehand, but the events still persisted. Restarting the Netlogon service fixed this for me straight away.
I started seeing this error after incorrectly using SETSPN.EXE on another machine. The mistake I made was that I gave another machine the same HOST name as the Domain Controller, which caused several machine to be looking at the wrong server for the DfsSvc Service. I discovered my problem by restarting the NetLogon Service, which produced an event stating that I had two machines with the same name. I removed the entries and everything went back to normal.
The Volume Shadow Copy Service was the trigger for this event in my case. I received the 14526 event after I received EventID 5 from source VolSnap. Follow the instructions posted for EventID 5 from Source VolSnap. I applied SP1 for W2k3 Server as ME887827
is included in SP1, and the problem was solved.