What do you do when all your PDF files have been converted to Adobe Illustrator files?

All of my PDF files have been converted to Adobe Illustrator files. I would like to know how to change then back to PDF files so that they save with the Adobe Reader logo and open with Adobe Reader.

http://Windows.Microsoft.com/en-us/Windows/change-file-open-program#1TC=Windows-7

Tags: Acrobat

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