A plug in is something added on to your internet browser to provide an additional specific functionality. If you are using Internet Explorer 9 you can manage your add-ons by clicking the Tools icon (or doing Alt+X) and selecting "Manage add-ons." If you observe the message you are getting and reply with information about what specific plug in it is asking you to install someone can give you more information.
What is plug in? Why I get this message about install plug in all the time?
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What is plug in? Why I get this message about install plug in all the time especially when watching online videos?
Windows for home | Previous Windows versions | Music, photos, and video
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