How do I fix my Java plugin?

In my Firefox browser, I have two potentially vulnerable plugins: "Java Deployment Toolkit 7.0.400.43" and "Java Platform SE 7 U40." I uninstalled Java Platform (I believe it was 6.0), so I'm not sure why it is showing as a plugin. Anyway, in my attempt to uninstall the Java 7 Update, I get an error message that says "The feature you are trying to use is on a network resource that is unavailable." I'm prompted to "Click Ok to try again, or enter an alternate path to a folder containing the installation package "jre.1.7.0_21-c.msi" in the box below.
It appears that a folder within my c drive is missing. I don't understand it as this is a file that I do not mess with. Apparently, it is the subfolders within the c drive; specifically, the appsdata subfolder was hidden! Even after I unhid it, I'm still missing the local subfolder which is where Java normally would go. Java is instead located on a local low subfolder, but I can't uninstall this because this path (Local low) is not recognized). Any help is much appreciated!!
I am not a computer geek, so can you please provide the answer in as simple a manner as possible? Thank you in advance for your time and efforts.

The first thing you should do is to '''uninstall''' older versions of Java. <br />
http://www.java.com/en/download/uninstallapplet.jsp
Then see this support article. <br />
https://support.mozilla.org/en-US/kb/use-java-plugin-to-view-interactive-content
Java Version 7 Update 45 is the latest version <br />
http://java.com/en/download/index.jsp

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AVtech wrote:
. . . If a person can't get an answer here I don't know where else to turn since Sun certainly wouldn't offer tech support for a free product . . .These forums are user forums, and only occasionally visited by Sun employees. Sun does provide Java technical support options, although (of course) at a charge.
See:
http://developers.sun.com/services/
. . . I guess we'll just use JRE 5 until it's unsupported, whenever that will be. I'm still waiting for an answer on that question, too. See:
http://java.sun.com/products/archive/eol.policy.html
http://www.sun.com/service/eosl/
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http://java.sun.com/javase/6/docs/technotes/guides/plugin/developer_guide/contents.htm
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See:
http://java.sun.com/javase/6/docs/technotes/samples/demos.html

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A greeting!!

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Thank you.

>
What do you mean a demo? I have tried to open pages e.g. on the http://www.jollylearning.co.uk/ website there is a preview of the books. I can't access this. The second error comes up. >
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Try a reinstall of Java:
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Post back

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How do I fix my Java plugin?

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