Turn on recommended updates via Automatic Updates

Supported on: At least Windows Vista through Windows 8.1 or Windows Server 2012 R2 with most current service pack. Not supported on Windows 10 and above.

Registry

HKLM Software\Policies\Microsoft\Windows\WindowsUpdate\AU

Value name: IncludeRecommendedUpdates

Enabled: IncludeRecommendedUpdates = 1

Disabled: IncludeRecommendedUpdates = 0

Description

Specifies whether Automatic Updates will deliver both important as well as recommended updates from the Windows Update update service. When this policy is enabled, Automatic Updates will install recommended updates as well as important updates from Windows Update update service. When disabled or not configured Automatic Updates will continue to deliver important updates if it is already configured to do so.