Edit C:\Windows\PolicyDefinitions\AutoPlay.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="autoplay" namespace="Microsoft.Policies.AutoPlay" />
    <using prefix="windows" namespace="Microsoft.Policies.Windows" />
  </policyNamespaces>
  <resources minRequiredRevision="1.0" />
  <categories>
    <category name="AutoPlay" displayName="$(string.AutoPlay)" explainText="$(string.AutoPlay_Help)">
      <parentCategory ref="windows:WindowsComponents" />
    </category>
  </categories>
  <policies>
    <policy name="NoAutorun" class="Both" displayName="$(string.NoAutorun)" explainText="$(string.NoAutorun_Help)" presentation="$(presentation.NoAutorun)" key="Software\Microsoft\Windows\CurrentVersion\Policies\Explorer">
      <parentCategory ref="AutoPlay" />
      <supportedOn ref="windows:SUPPORTED_WindowsVista" />
      <elements>
        <enum id="NoAutorun_Dropdown" valueName="NoAutorun">
          <item displayName="$(string.NoAutorun_Disabled)">
            <value>
              <decimal value="1" />
            </value>
          </item>
          <item displayName="$(string.NoAutorun_XP)">
            <value>
              <decimal value="2" />
            </value>
          </item>
        </enum>
      </elements>
    </policy>
    <policy name="DontSetAutoplayCheckbox" class="Both" displayName="$(string.DontSetAutoplayCheckbox)" explainText="$(string.DontSetAutoplayCheckbox_Help)" key="Software\Microsoft\Windows\CurrentVersion\Policies\Explorer" valueName="DontSetAutoplayCheckbox">
      <parentCategory ref="AutoPlay" />
      <supportedOn ref="windows:SUPPORTED_WindowsVista" />
      <enabledValue>
        <decimal value="1" />
      </enabledValue>
      <disabledValue>
        <decimal value="0" />
      </disabledValue>
    </policy>
    <policy name="Autorun" class="Both" displayName="$(string.Autorun)" explainText="$(string.Autorun_Help)" presentation="$(presentation.Autorun)" key="Software\Microsoft\Windows\CurrentVersion\Policies\Explorer">
      <parentCategory ref="AutoPlay" />
      <supportedOn ref="windows:SUPPORTED_Win2k" />
      <elements>
        <enum id="Autorun_Box" valueName="NoDriveTypeAutoRun" required="true">
          <item displayName="$(string.Autorun_NoCD)">
            <value>
              <decimal value="181" />
            </value>
          </item>
          <item displayName="$(string.Autorun_None)">
            <value>
              <decimal value="255" />
            </value>
          </item>
        </enum>
      </elements>
    </policy>
    <policy name="NoAutoplayfornonVolume" class="Both" displayName="$(string.NoAutoplayfornonVolume)" explainText="$(string.NoAutoplayfornonVolume_Help)" key="Software\Policies\Microsoft\Windows\Explorer" valueName="NoAutoplayfornonVolume">
      <parentCategory ref="AutoPlay" />
      <supportedOn ref="windows:SUPPORTED_Windows7" />
      <enabledValue>
        <decimal value="1" />
      </enabledValue>
      <disabledValue>
        <decimal value="0" />
      </disabledValue>
    </policy>
  </policies>
</policyDefinitions>

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