Doyou want to run the installer in repair mode?
I was able to resolve the same issue in MS Word 2003 by checking
"Disabled Items" by taking the following steps:
1. Open MS Word/Excel.
2. On the menu at the top, click on "Help".
3. Select "About Microsoft Word/Excel".
4. If you have a "Disabled Items" button, click on it, and look for
any Adobe items to re-enable.
Here are a few more steps, from Adobe's support site:
http://kb.adobe.com/selfservice/viewContent.do?externalId=333235&sliceId=2
Solution 2: Make sure PDFMaker components are installed.
1. Choose Start > Run, type appwiz.cpl in the Open text box, and then
click OK to open the Add Or Remove Programs dialog box.
2. Locate and select Adobe Acrobat 7 or Adobe Acrobat 8 and click
Change/Remove.
3. When the Wizard appears, click Next.
4. Select Modify and click Next again.
5. Expand the Create Adobe PDF tree view, and then click on the down
arrow on the Acrobat PDFMaker object.
6. Select "This feature will be installed on the local hard drive,"
click Next, and then click Update.
Solution 3: Enable the COM add-in file in the Office application.
1. Start the Office application.
2. Choose Help > About [application].
3. Click Disabled Items.
4. Check the list for PDFMakerOfficeAddin:
* If it's listed, then select it and click Enable. Close all dialog
boxes and restart the Office application.
* If it's not listed, then make sure that PDFMOfficeAddin.dll is
located in the Acrobat 7.0/PDFMaker/Office (Acrobat 7, Acrobat 3D) or
Acrobat 8.0/PDFMaker/Office (Acrobat 8) folder. If the file is
missing, then reinstall Acrobat.