Adobe Reader 8.1.2

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View and print Adobe Portable Document Format files.
Adobe Reader is free software that lets you view and print Adobe Portable Document Format (PDF) files on a variety of hardware and operating system platforms.

A 3rd party speedup tool for Adobe Reader is also available. It disables many of the plugins that are not needed. It has an easy to use interface including a couple of speed options as well as restore to default. Download that here.
  Adobe Reader 8.1.2