Acrobat PDF missing from Word doc.

OS is XP
Acrobat 7
Word 2003

Before, I could open a Word doc. And Adobe PDF was listed at the top, in the menu options and the icons for converting to PDF were all present on the Word doc.

This made it easy to convert the Word doc to a PDF.

Now Word has no mention of Adobe.

Recently, I accidentally deleted some files from my temporary internet files and I suspect this caused the problem.

Can someone tell me how to retrieve the missing files or suggest a fix for this problem?

I have another computer with everything working normally and perhaps I can copy the files from it but I don’t know what or where they are.

Any suggestions?