Creating a pdf

SOURCE: Creating PDF files with Vista

Did your earlier computer have Acrobat on it? That's the only way to print to a PDF, unless you have software designed to emulate Acrobat, by simulating a PDF file format.

SOURCE: Cannot Create PDF from Word Document Using Adobe Professional 6.0

You can try to create PDF file directly from Microsoft Word. Adobe Acrobat Professional installs a virtual printer on your computer. Print the document from Microsoft Word, but make sure you select appropriate printer from the list. It should be called "Adobe Acrobat PDF Printer", or similar.

SOURCE: Cannot create PDF from MS word

click yes and you will get the automatic upgrade and then you can save as .pdf

SOURCE: Need help finding the "Adobe PDF" menu

unless you have Adobe writer, you cannot edit or convert a .pdf, .pdf is read only
Adobe writer is not a free download
You can, however, go to edit, select all, paste to wordpad and then edit and save as .doc

SOURCE: I can no longer create 1 pdf file from mulitple files in acrobat 6.0 standard. I have to create a pdf for each file in word or excel and then open up acrobat and create 1 pdf file from multiple pdfs.

Have you tried appending to the document? this should give you the option to add multiple files to..