DPM 2012 Huge System Information Volume

I seem to have the following problem described in the article linked

http://social.technet.microsoft.com/Forums/en-US/6fd8ac46-7599-4071-8630-b304fc91b8c6/dpm-2012-sp1-and-hyperv-2012-large-system-volume-information-folder

The problem i have is that i am backing up a Hyper-V Cluster with DPM 2012 R2 not SP1 as stated here but am guessing that they are both suffering from the same issue.

First question is where do i find updates for SCCM Products to see if any are relevant?

Other question do you guys have any idea how I can delete the files that don’t show up in my System Volume Information that are 1.5TB.

Any ideas when MS are going to put a hotfix out?

Cheers in advance