Acrobat 8 Professional on WINDOWS 8

When installing Adobe Acrobat 8 Professional on WINDOWS 8,

I get the following error message:

"The file 'AdobePDF.dll' on Windows Vista CD-ROM is needed.

Type the path where the file is located, and then click OK."

Question: Where can I find the 'AdobePDF.dll' file ?

thanks for your help,

Fred.

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