Edit C:\Windows\PolicyDefinitions\en-US\WindowsAnytimeUpgrade.adml

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

<policyDefinitionResources 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">
  <displayName>enter display name here</displayName>
  <description>enter description here</description>
  <resources>
    <stringTable>
      <string id="WAU">Add features to Windows 8.1</string>
      <string id="WAU_Help">Contains settings to control the behavior of the Add features to Windows 8.1 wizard.</string>
      <string id="DisableWAU">Prevent the wizard from running.</string>
      <string id="DisableWAU_Help">By default, Add features to Windows 8.1 is available for all administrators.

If you enable this policy setting, the wizard will not run.

If you disable this policy setting or set it to Not Configured, the wizard will run.</string>
    </stringTable>
  </resources>
</policyDefinitionResources>

Ms-Dos/Windows Unix Write backup

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