or contact them as to how. But, it's probably a hidden partition which you can remove with 3rd party applications or just use something like ptedit32 to make it visible and then delete it through Windows.
I am trying to remove a recovery partition i created using Norton Ghost 15. It is called LightsOutRestore. I have looked in Disk Management and cannot find it. I need to remove it because I am going to be dual-booting my PC with Ubuntu.