smswriter using 100% CPU for hours

Hello,

I have an issue with one site server where smswriter is using 100% CPU for hours (4 hours already).

What could be the cause(s)? the SCCM backup is running but most likely nothing else ... it is a reporting server with no client pointing to it straight.

Which jobs/tasks/ etc... are using smswriter?

Thanks,

Dom

System Center Operations Manager 2007 / System Center Configuration Manager 2007 R2 / Forefront Client Security / Forefront Identity Manager