What is going on with Windows 7 media streaming not enabled?

Question: My family has two Windows 7 computers, one of which prompts when setting up a home group: "The media stream is disabled by the administrator-defined group policy", I don't know why this is the case, another computer does not have this problem!
Answer: This should be the use of third-party optimization software does not intend to disable the "Windows Media Player Network Sharing Service" service, this problem will occur. You can open the service window and find the "Windows Media Player Network Sharing Service" in the <;Start → Search Box"Start"Service" Service” or “services.msc”, double-click to open the properties of the service, it will start Set the type to “Auto” and then manually enable this service to set up the family group.