PDF Maker unavailable

Hi

I work under W7 / Office 2007.

PDF maker addin is unavailable.

As a result cannot save Office documents as PDF.

Tried all 5 solutions proposed in product help.

Re-installed Acrobat Reader half a dozen times : different versions, under modified mode.

PDF maker is never to be found in C:/Program files/Adobe/Reader.

dll cannot be found.

Can you help?

Thanks