In reply to Frankie boy:
I use the Windows 10 built-in "Print to PDF" feature for creating PDFs - it is really solid.
For most applications, including Word and LibreOffice, you can save directly as PDF - this also works on Windows-not-10.
I recommend Sumatra PDF for viewing the damn things - it is tiny, simple and it works. It is free and open-source and never asks to update or phones home. It also remembers where you were in each PDF so, if you open the same one again, you return to your previous location.