Trying to install Acrobate 8 Standard on PC with Windows 7, 64 bit. During the installation I was asked to provide "File Adobe PDF.dll for Windows Vista. How can I obtain the required file?

Nothing in the Acrobat 8.x product family is compatible with Windows 7 (or any contemporary OS).

The Acrobat 8.x product family passed into End of Support way back -- (November 2011).

The current release of Acrobat (XI) is compatible in Windows 7.

Be well...