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My company makes use of the latest version of Oracle JRE (1.8.0u66), though I use the JDK instead of only the JRE. The client I'm dispatched to requires the latest version of Oracle JDK 6 (1.6.0u45) given they bought explicit long term support from Oracle.

Having both installed causes conflict and neither my company apps or my customer all runs correctly. If I use either one of them only, there are no issues in the respective applications.

I believe that in the past it was possible to download unzippable versions of any JDK for Windows. Now I see they all come bundled in an executable.

Given that, I know that having the latest version installed and the JDK 6 simply unzipped will work properly since nothing will be messed up in registry or stuff like that, which is currently causing the trouble. I know because I have to manually setup some important environment variables and I know how to play with those to have the client application running on my PC.

So my question is the following: is it possible to somehow retrieve an archive-only version of the JDK 6 I require for Windows? If yes, where or how?

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    The archive-only Windows versions started in 7. If you run any JDK.exe installer and set the third item (Public JRE) to red-X "not available" it won't install the "system" JRE which is the one that messes with the registry and does autoupdate and such. The "embedded" JRE in JDKLOC/jre can be used manually. (Personally I also exclude "JavaDB" on versions that have it.) Alternatively, IIRC the 6 license allowed you to just copy all JRE files anywhere as long as you don't replace then-Sun code with your own (i.e. you don't change "official trademarked Java" to "sort of mostly Java").
    – dave_thompson_085
    Dec 23, 2015 at 4:17
  • This is nice to know. I'll try this and if it works you might consider make this an answer!
    – Olivier Grégoire
    Dec 23, 2015 at 12:03
  • @dave_thompson_085 I'll write an answer with your solution and accept it. If you ever want to, please make your answer and I'll switch to yours as accepted answer.
    – Olivier Grégoire
    Jan 13, 2016 at 13:04

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As dave_thompson_085 explained, I have to deselect the "Public JRE" from the installation package, as showed in the image below below.

Install JDK without JRE registering everywhere

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