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.

Portable document format (PDF) files remain a popular choice for business documents ranging from contracts and forms to manuals and reports, so there's a good chance you need to open them often.

When you double-click on a file in Windows, it will automatically open a default program that is configured to manage these types of files. It is common, though, want or need to use a different ...

It’s been more than 25 years that PDF files have been around, and they’re not going anywhere anytime soon. As PDFs are the most popular format for presentations and document sharing, they are heavily ...

The Portable Document Format makes it possible for you to open and view documents, no matter what operating system, software or computer you have. To make this happen in Yahoo Mail, the email program ...

When you open files that have a particular file extension, Windows will look at its configuration to determine what the default program should be in order to work with these files. The default program ...

Kayode Oluwatayo is an Evergreen Author at Android Police. He covers how-to guides and detailed explainers about Android, smartphones, apps, and various tech topics. With almost half a decade of ...