Originally Posted by CyberSEO

Any modern Windows application can do it. E.g.: FastStone Image Viewer - Powerful and Intuitive Photo Viewer, Editor and Batch Converter

1) Click "Ctrl+B" to scan.
2) Click "Ctrl+S" and select "PDF" as output format.

Can it be easier?

If you want to convert your formatted text documents (including images etc) into PDF, use LibreOffice: https://www.libreoffice.org/

Both applications are freeware and there are many other alternatives, of course.