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I'd like to install Adobe Reader X but for various reasons I'm not quite ready to get rid of Reader 9 yet. Is it possible to install Reader X but avoid the automatic removal of Reader 9 in the process?

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My first thought (it wasn't very helpful) was why do you want either of the horrible bits of bloatware. – Col Aug 19 '11 at 19:12
It might help to know the various reasons. – soandos Aug 19 '11 at 19:14
Adobe Reader X is less vulnerable to various PDF exploits due to the code sandboxing and other techniques. – Anthony Giorgio Aug 19 '11 at 19:20

Some users find it helpful to mix and match the features and workflows from different versions of Adobe Acrobat to achieve familiar results with their documents. However, as a best practice, only one version of Adobe Acrobat should be installed on a single computer. The presence of two or more versions of the same program on one machine consistently leads to disabled functionality, printer conflicts, and PDF display errors in web browsers, among other problems. Nevertheless, for users willing to accept the risks, installation of multiple Acrobat versions is relatively simple.

Read more about it on: How to Install Multiple Instances of Adobe Acrobat

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That looks like it's about the standard version rather than the reader, I couldn't find anything except horror stories for multiple versions of the reader that were newer than version 7. – Col Aug 19 '11 at 19:29
Well ok let me explain you in easy terms – aibk01 Aug 19 '11 at 19:30
I think there are some known issues, i also tried but there was conflict even i tried installing it on different drives.Let me find a working solution my self and come back to you. – aibk01 Aug 19 '11 at 19:37

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