Missing PDF maker file - Acrobat 9 Pro Extended

I tried to convert .docx file to .pdf file using Adobe Acrobat 9 and I got the message "Missing PDFMaker flies. Do you want to run the installer in repair mode?"

I look for solution online ans I was told to enable Add-in in Microsoft Word (I'm using 2007 version), so I tried but I got the message "The connected state of Office Add-ins registered in HKEY_LOCAL_MACHINE cannot be change" 

I tried to run Word as administrator but It still doesn't work. I run Regedit, but there is no PDFMaker key in addins folder. I tried to change LoadBehavior from 2 to 3 and back. It didn't work, too. (Picture below)

I'm lost. Any advices are appreciated. I apologize if my post isn't clear. I'm not good at English. Also, I don't know if I should post this in Microsoft office support forum instead.

Thank you in advance 🙂