Windows 7 Ultimate - Prevent system from updating time settings

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If you don't want Windows 7 to automatically update the time settings by contacting Microsoft's server:
To disable Homegroup Sharing:
  • Click on Start > Run > Type "services.msc"
  • In the Services window, look for the following entries in the the right pane:
  • Windows Time"
  • Set their Startup type as "Disabled"
  • Click on OK to validate.
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