Edit C:\Windows\PolicyDefinitions\DiskDiagnostic.admx

<?xml version="1.0" encoding="utf-8"?>

<policyDefinitions xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" revision="1.0" schemaVersion="1.0" xmlns="http://schemas.microsoft.com/GroupPolicy/2006/07/PolicyDefinitions">
  <policyNamespaces>
    <target prefix="diskdiagnostic" namespace="Microsoft.Policies.DiskDiagnostics" />
    <using prefix="windows" namespace="Microsoft.Policies.Windows" />
  </policyNamespaces>
  <resources minRequiredRevision="1.0" />
  <supportedOn>
    <definitions>
      <definition name="SUPPORTED_WindowsLonghornServerDesktopExperienceOrVista" displayName="$(string.SUPPORTED_WindowsLonghornServerDesktopExperienceOrVista)" />
    </definitions>
  </supportedOn>
  <categories>
    <category name="WdiScenarioCategory" displayName="$(string.WdiScenarioCategory)">
      <parentCategory ref="windows:Troubleshooting" />
    </category>
  </categories>
  <policies>
    <policy name="DfdAlertPolicy" class="Machine" displayName="$(string.DfdAlertPolicy)" explainText="$(string.DfdAlertPolicyExplain)" presentation="$(presentation.DfdAlertPolicy)" key="SOFTWARE\Policies\Microsoft\Windows\WDI\{29689E29-2CE9-4751-B4FC-8EFF5066E3FD}">
      <parentCategory ref="WdiScenarioCategory" />
      <supportedOn ref="SUPPORTED_WindowsLonghornServerDesktopExperienceOrVista" />
      <elements>
        <text id="DfdAlertPolicyTitle" valueName="DfdAlertTextOverride" required="true" maxLength="512" />
      </elements>
    </policy>
    <policy name="WdiScenarioExecutionPolicy" class="Machine" displayName="$(string.WdiScenarioExecutionPolicy)" explainText="$(string.WdiScenarioExecutionPolicyExplain)" key="SOFTWARE\Policies\Microsoft\Windows\WDI\{29689E29-2CE9-4751-B4FC-8EFF5066E3FD}">
      <parentCategory ref="WdiScenarioCategory" />
      <supportedOn ref="SUPPORTED_WindowsLonghornServerDesktopExperienceOrVista" />
      <enabledList>
        <item key="SOFTWARE\Policies\Microsoft\Windows\WDI\{29689E29-2CE9-4751-B4FC-8EFF5066E3FD}" valueName="ScenarioExecutionEnabled">
          <value>
            <decimal value="1" />
          </value>
        </item>
        <item key="SOFTWARE\Policies\Microsoft\Windows\WDI\{29689E29-2CE9-4751-B4FC-8EFF5066E3FD}" valueName="EnabledScenarioExecutionLevel">
          <value>
            <decimal value="2" />
          </value>
        </item>
      </enabledList>
      <disabledList>
        <item key="SOFTWARE\Policies\Microsoft\Windows\WDI\{29689E29-2CE9-4751-B4FC-8EFF5066E3FD}" valueName="ScenarioExecutionEnabled">
          <value>
            <decimal value="1" />
          </value>
        </item>
        <item key="SOFTWARE\Policies\Microsoft\Windows\WDI\{29689E29-2CE9-4751-B4FC-8EFF5066E3FD}" valueName="EnabledScenarioExecutionLevel">
          <value>
            <decimal value="1" />
          </value>
        </item>
      </disabledList>
    </policy>
  </policies>
</policyDefinitions>

Ms-Dos/Windows Unix Write backup

jsp File Browser version 1.2 by www.vonloesch.de