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Question

Invalid file extension

Sep 30, 2015 4:42PM PDT

What is Invalid file extension information and how to clear or repair it?

Discussion is locked

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Answer
E.g. file ABCDEFG.XYZ. XYZ is the file extension.
Sep 30, 2015 4:54PM PDT

For more info we'll need to see the exact full name of the file you're asking about.

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Answer
Actually I've yet to read that a file extension is invalid.
Sep 30, 2015 5:00PM PDT

There is no rule in Windows that the .CNET files are invalid. So help.cnet is a valid file and extension. That said it could be invalid to open those with Word.