Link to VHD of System Center Essentials 2007 from Microsoft Downloads.
System Center Essentials 2007 is a new management solution specifically designed for IT professionals working in midsize businesses who often face IT challenges similar to those of larger enterprises—troubleshooting user problems, automating management tasks, managing multiple systems, and diagnosing and resolving IT problems. And when you download the 90-day trial software, you're automatically registered to receive valuable resources delivered at strategic intervals throughout the software evaluation period.