By disabling the Windows prefetch and superfetch features, you can avoid generating prefetch files and the overhead associated with prefetch and superfetch operations. This action can reduce the growth of linked-clone desktops and minimize IOPS on full virtual machines and linked clones.

To disable the prefetch and superfetch features, you must edit a Windows registry key and disable the Prefetch service on the virtual machine.

See the Microsoft TechNet Web site for information on how to use the Windows Registry Editor on Windows 7 and Windows 8.

1

Start the Windows Registry Editor on the local Windows 7 or Windows 8 virtual machine.

2

Navigate to the registry key called PrefetchParameters.

The registry key is located in the following path: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Session Manager\Memory Management\PrefetchParameters.

3

Set the EnablePrefetcher and EnableSuperfetch values to 0.

4

Click Start > Control Panel > System and Security > Administrative Tools.

5

Select Services and click Open.

6

Double-click the Superfetch service.

7

In the Superfetch Properties (Local Computer) dialog, click Stop.

8

In the Startup type menu, select Disabled.

9

Click OK.