You may need to adjust your printer settings. I am not sure about on windows, but save as pdf options are double-fold on mac. Go to print, choose particular printer & choose Adobe PDF as printer (or in Page Set up to choose adobe) or as in case on mac, on the print options there's also a drop down menu to save file as pdf. Don't forget if you have upgraded to 8 from 7 then your previous settings for 7 might still be default & since 7's support files will be no longer ... it won't work, so be sure to make sure the setting is for v.8.

I can open an image up with most programs & either save as pdf (if the program supports it) or definitely save as pdf under Print window.

I can't answer about the scanner since mine is so old & is connected to old computer with old system, & program versions, etc. lol