Edit C:\Windows\PolicyDefinitions\WordWheel.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="wordwheel" namespace="Microsoft.Policies.WordWheel" />
    <using prefix="windows" namespace="Microsoft.Policies.Windows" />
  </policyNamespaces>
  <resources minRequiredRevision="1.0" />
  <categories>
    <category name="WordwheelPolicies" displayName="$(string.WordwheelPolicies)">
      <parentCategory ref="windows:WindowsComponents" />
    </category>
  </categories>
  <policies>
    <policy name="CustomSearch" class="User" displayName="$(string.CustomSearch)" explainText="$(string.CustomSearch_Explain)" presentation="$(presentation.CustomSearch)" key="Software\Microsoft\Windows\CurrentVersion\Policies\Explorer\SearchExtensions">
      <parentCategory ref="WordwheelPolicies" />
      <supportedOn ref="windows:SUPPORTED_WindowsVista" />
      <elements>
        <text id="CustomSearch_NamePrompt" valueName="InternetExtensionName" required="true" />
        <text id="CustomSearch_URLPrompt" valueName="InternetExtensionAction" required="true" />
      </elements>
    </policy>
  </policies>
</policyDefinitions>

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