invalid libraries in a new install

hello, I am an absolutely new starter to Arduino, I have installed the ide, typed ina small sketch but as I upload it, I get a message saying invalid in libraries in users/Lenovo/documents.arduino and also no .h files in the same directory, and sure enough there are none do I have to copy these from somewhere? should they be there by default from the install? any ideas gratefully accepted regards

You've garbled the warning. Please copy and paste the exact warning text here.

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