The print window has a little icon that says "print". It now says "save" and it goes to a PDF. I just want it to print again.
You mention later you "did the default thing", but from what you've described it really does sound like Geek-9pm was on the right track, as it seems like you or somebody else (or another program you installed) also installed a "fake" Printer which will output to PDF.
If you start Notepad and choose File->Print, you should get a dialog like this one:
It shows all the "printers" you have installed and available. As you can see, I have a green checkmark on my HP LaserJet 200. If I press Print, it will go through and print it.
Can you verify that your Brother printer is appearing in the same way?