How to compress Virtual PC virtual hard disks (.VHDs)
Clear out the machine of filler I recommend installing CCLEANER.EXE from http://ccleaner.com which deletes all temporary files from the Windows installation, Internet Explorer cache, the Recycle Bin, and any number of other "garbage"/"temp" directories in the VPC. Disable hibernation If you have hiberation turned on, there’s a colossal sized file called hiberfil.sys in the root of the .VHD. Go into Power options in Control Panel and disable hiberation to get rid of this file. Capture the Virtual Disk Precompactor .ISO In the menu of Virtual PC windows for …