Disabling the Windows registry backup feature, RegIdleBackup, can minimize the number of system writes and reduce the growth of linked-clone machines.

The following steps apply to Windows 7 and Windows 8. The steps might vary on different Windows operating systems.


  1. In vSphere Client, select the parent virtual machine and select Open Console.
  2. Log in to the Windows guest operating system as an administrator.
  3. Click Start > Control Panel > System and Security > Administrative Tools.
  4. Select Task Scheduler and click Open.
  5. In the left pane, expand Task Scheduler Library, Microsoft, Windows.
  6. Double-click Registry and select RegIdleBackup.
  7. In the Actions pane, click Disable.