Got a weird one, I just cant figure it out...

We have TMG on a server and Forefront as spam filter on same server, every 5 mins the process "FSEAntiSpamSettings.exe" grabs 50% of the CPU for about 40 seconds then dies down and 5 mins later starts again. This never used to happen its only something recently...A search on the internet shows someone with the same problem but never got to the bottom of it.

Anyone have any ideas? I'm fresh out.