PDFMaker

I use Adobe Acrobat 8.1 Professional which I installed Nov 06. I find I can no longer use Acrobat's Create PDF - either for a single file or a multiple file. When it is "starting the application which created the document...", I get "Create Adobe PDF - Missing PDFMaker files. Do you want to run the installer in repair mode?" I've said yes several times. I also ran "repair" from the Acrobat CD. I think the situation which caused all of this began with receiving a Word 2007 file with a docx extension. When I tried to open it, my Word 2003 said the file was created by a newer version (which was Word 2007) and did I want to download a compatibility pack? I said yes. Then when I was in my Word 2003 I noticed my Acrobat integration was missing - only the menu titles were there - no options. So I restored my Windows XP SP2 system to just prior to installing the compatibility pack. AFter that I began receiving the errors listed above when I tried to use Create PDF to work with a Word 2003 document in Acrobat. I am able to work with Excel 2003 documents with no problems at all. My Word 2003 integration with Acrobat shows nothing under the menu listing for Adobe PDF or Adobe Comments. I have even reinstalled Word 2003 and Office 2003 SP2 (I've not yet reinstalled any MS patches) since Excel works OK. What do I do next? If you think I should reinstall the entire Acrobat 8 Pro, should I uninstall Acrobat first before reinstalling it. When I check for updates to my Acrobat 8.1, it says no updates available, since I recently updated it. I don't think I've actually used the Create PDF feature recently, but I'm assuming today's problems were caused by installing the compatibility pack and not by an Acrobat update.