Edit C:\Windows\PolicyDefinitions\msched.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="1.1" schemaVersion="1.0" xmlns="http://schemas.microsoft.com/GroupPolicy/2006/07/PolicyDefinitions">
  <policyNamespaces>
    <target prefix="msched" namespace="Microsoft.Policies.MaintenanceScheduler" />
    <using prefix="windows" namespace="Microsoft.Policies.Windows" />
  </policyNamespaces>
  <resources minRequiredRevision="1.0" />
  <categories>
    <category name="MaintenanceScheduler" displayName="$(string.MaintenanceScheduler)">
      <parentCategory ref="windows:WindowsComponents" />
    </category>
  </categories>
  <policies>
    <policy name="ActivationBoundaryPolicy" class="Machine" displayName="$(string.ActivationBoundary)" explainText="$(string.ActivationBoundaryHelp)" presentation="$(presentation.ActivationBoundaryPolicy)" key="Software\Policies\Microsoft\Windows\Task Scheduler\Maintenance">
      <parentCategory ref="msched:MaintenanceScheduler" />
      <supportedOn ref="windows:TS_SUPPORTED_Windows7" />
      <elements>
        <text id="ActivationBoundary" valueName="Activation Boundary" />
      </elements>
    </policy>
    <policy name="RandomDelayPolicy" class="Machine" displayName="$(string.RandomDelay)" explainText="$(string.RandomDelayHelp)" presentation="$(presentation.RandomDelayPolicy)" key="Software\Policies\Microsoft\Windows\Task Scheduler\Maintenance" valueName="Randomized">
      <parentCategory ref="msched:MaintenanceScheduler" />
      <supportedOn ref="windows:TS_SUPPORTED_Windows7" />
      <enabledValue>
        <decimal value="1" />
      </enabledValue>
      <disabledValue>
        <decimal value="0" />
      </disabledValue>
      <elements>
        <text id="RandomDelay" valueName="Random Delay" />
      </elements>
    </policy>
    <policy name="WakeUpPolicy" class="Machine" displayName="$(string.WakeUp)" explainText="$(string.WakeUpHelp)" key="Software\Policies\Microsoft\Windows\Task Scheduler\Maintenance" valueName="WakeUp">
      <parentCategory ref="msched:MaintenanceScheduler" />
      <supportedOn ref="windows:TS_SUPPORTED_Windows7" />
      <enabledValue>
          <decimal value="1" />
      </enabledValue>
      <disabledValue>
          <decimal value="0" />
      </disabledValue>
    </policy>
  </policies>
</policyDefinitions>

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