Print to PDF (two PCs, editable text from only one)

Thanks if anyone can explain the factors that might cause this, why my workstation prints documents to PDF with selectable text and my laptop doesn't (the PDFs it creates are seemingly just pictures of text). Both machines run Windows 7 Professional and have Acrobat Standard 9.5 as printers. Usually I print Word documents or web articles with Firefox. I've tried duplicating browser and Acrobat settings between  machines, but still a URL printed to PDF on my workstation is an editable document, while the same link printed on my Lenovo ThinkPad is not. Probably I'm overlooking something fundamental. Thanks for suggestions.