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One feature I like about Norton’s reputation-checking is that it’s not just limited to files you download. You can also use it to check any file that you don’t recognize. So if you see a program file or DLL whose name you don’t recognize, you can right-click and check the Norton File Insight menu.
In this case, the file is part of Windows Media Center, This technique is especially useful if you see a file in a Startup folder that sets off red flags. It's also extremely helpful when you’re downloading files or add-ons from small developers or open-source projects, where the download might come from a central site that isn’t well known.
For a more detailed discussion, see the companion blog post, Who makes the best Windows security software? Surprise ...