Disabling the prefetch and superfetch features avoids some I/O operations to the file system and can reduce the growth of an instant clone's or a View Composer linked clone's virtual disk.
To disable the prefetch and superfetch features, you must edit a Windows registry key and disable the Prefetch service on the virtual machine.
The following steps apply to Windows 7 and Windows 8. The steps might vary on different Windows operating systems.
Prerequisites
See the Microsoft TechNet Web site for information on how to use the Windows Registry Editor.