I have recently received a few files from various people which are prn files.
Windows doesn't recognize them so they wont print. Am I missing something? or
do I need to download something to update windows? Can anyone help?
It's not Windows that doesn't recognize them, it's your *printer* that
doesn't recognize them. And no, you can't download anything or do
anything to fix the situation; it's the sender that needs to.
As a general rule, most prn files are useless to you. Each person who
sent you a pdf file created it on their computer using the printer
driver for the particular printer they have installed. If you have the
same printer installed, you can send the prn file to your printer, but
if your printer is a different one, it won't understand the prn file.
It's for that reason that prn files are not normally sent to others
(they could also install the driver for *your* printer on their
computer, but that's a nuisance and most people won't do that).
If you need to receive a file that you can print from other people,
ask the people to create and send you a pdf file, not a prn file.