Are you trying to print a PDF document or file with Adobe Reader and get an error message that says:
Before you can perform print-related tasks such as page setup or printing a document, you need to install a printer.
The actual problem is that there isn’t a default printer set on your computer. It’s very easy to do, however, you are probably here because you already tried that. If you haven’t, follow solution 1, but if you have, start with solution 2.