Updating java in windows

Many suggest disabling scripting in your browser as a security means, but, if one of the websites you frequent requires that, you would need to turn it on again.You system may not become crippled for any of this but some of your applications might if JAVA is removed. Software can have security holes; the programming language it is written in cannot; that's a bunch of bunk!

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As a matter of fact, I don't know what it does for my system.

I hope you don't find my question naive, but do I even need it?

Previously, I've just uninstalled the JRE after I've used it to restore the JDK. This also manifests itself with the jre autoupdater - once upon a time, I had a working setup with the JDK and JRE, but it updated and bust everything.

I have several JDK (1.4, 1.5, 1.6) installed in C:\Java with their JREs.

If I choose not to update it, will it leave my system crippled somewhere or possibly vulnerable to anything? Since you seem not to know a lot about what JAVA is, I'll try to just cover the basics.

Can I live without it and is it possible to remove it altogether? I am too lazy to look up dates but I'm sure that you can if that is important. You have the "Windows" computers that are derivatives of the old IBM PC line of computers.There are LINUX machines and there are various cell phone platforms.There also were/are computers that were UNIX systems (Solaris, HP_UX, etc.).Then I let Sun update the public JRE in C:\Program Files\Java Lately there is an improvement, installing in jre6.Previously, there was a different folder per new version (1.5.0_4, 1.5.0_5, etc.), which was taking lot of space longer version: Reinstall Java 1.8 after Java 9 didn't work.I'm in the situation where I've installed the JDK, but I can't run applets in browsers (I may not have installed the JRE).

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