Adobe's portable document format (PDF) has become a standard for exchanging and distributing documents. PDF files look like the original document would look if it were printed, and can be read on just ...

Q: Sometimes when I try to open a file or e-mail I get the message: "The selected file has an extension (PDF) that is not recognized by Windows Media Player but the player may be able to play it.

Adobe Acrobat Reader is many users’ favorite PDF reader, and it’s been around for many years. However, it’s not without its fair share of issues. These problems ...