Sometimes when opening a PDF file, it will give off a security warning. The warning is displayed for PDF files that are transferred or run programs and macros that can be harmful to your computer.

Whether you're considering joining the digital book revolution for the first time or simply want to upgrade, these are the top ereaders we've tested for every type of bookworm. I’m PCMag’s home ...

Nitro PDF is one of the most full-featured PDF editors available and the strongest alternative to Adobe Acrobat DC. As Adobe Acrobat alternatives go, Nitro PDF remains near the top of the heap. The ...