Coexisting Installations and Version Interoperability

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How can I install Acrobat 7.0 and 8.0 on the same desktop machine?

I’ve gotten this question a lot lately. The details change; sometimes it’s Adobe Reader 8 and Adobe Acrobat 7, or 6…even 5. The answer is always the same. Don’t do it!

If two versions of Acrobat are installed on the same computer, only the higher version of Acrobat ‘s PDFMaker and Adobe PDF printer will be used and conflicts may occurs if multiple versions of PDFMaker are attempting to load into Microsoft Office applications. Additionally, Acrobat and Reader have several system level components that can cause conflicts that mostly involve the plug-ins or OCX controls for rendering PDF files in a browser.

Can I install the same version of Reader and Acrobat on a single machine?

Although you can install Acrobat 8.0 and Reader 8.0 on the same machine, as I have, there can still be issues. In a browser, only the one that’s running will be used to display PDF files regardless of which one opens when you double-click on a file. So if you want to view a PDF in the browser but need to control which PDF viewer the browser uses, start that version of the viewer first, and then launch your browser.

So, now that I’ve given you this advice, should you decide to uninstall one version or the other, please see the TechNote referenced below for details on how to do that and what the consequences could be.

TechNote 333223



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