Luckily, printers don't have to recognize pdf-files. They only recognize spoolfiles that your pdf reader makes when you print a pdf. What pdf reader do you use? Maybe try another one?
I assume it prints everything else. Then it's something strange in your PC. If it prints nothing at all (try to print something from Notepad), it can be a printer problem, but just as well a problem with your PC also.
My HP Printer model recently purchased stopped recognizing PDF files