Microsoft has released a hotfix for Windows HPC Server 2008 R2

This update modifies the behavior of the HPC Job Scheduler's 'Preemption Policy'

This hotfix need to be run on the headnode.

To start the download, click the Download button and then:
1) Click Save to copy the download to your computer.
2) Run the download on the headnode.
Note: If you have a pair of HA headnodes, run the fix on the Active node and after failover occurs run the fix on the new Active node

  HPC Pack 2008 R2 SP2 Fix for Changing Job Preemption Policy