What kind of 34KB add-on?
All I can tell you is it's title in the "Programs and Features" tool of Windows 7. To whit: "Adobe Acrobat 9 Pro Extended 64-bit Add-On." It has an installation date of 8-30-2011 and is only 34KB in size, according to Windows. It is listed below the Main Acrobat 9 Pro program, which doesn't give it's size, but does give the current version of 9.5.2, which is the latest for Acrobat 9 Pro as far as I know.
The one thing I want to establish is whether this add-on is necessary for the current version of Acrobat 9 Pro to function or not. I can find no guidance on Acrobat's website; at least a search reveals nothing anyway. And it is not referenced in their update site at all. If worse comes to worse, I will call them for guidance because our security types are listing it as a problem, and I am wondering if they are confusing this add-on with the main program.
Hope this helps with your knowledge, and thanks for replying.