Quick quesion about installing newer versions of Java

I've got Windows XP Home and I had a quick check in Add or Remove (in Control Panel) and realised that I've got: -
J2SE Runtime Environment 5.0 Update 5 and
J2SE Runtime Environment 5.0 Update 6
I've read that Java Runtime Environment 1.5.0.7 is available.
I also heard that some older versions of Java may have security holes so should I install Java Runtime Environment 1.5.0.7 and if yes, should I delete the older versions that I've already got?
Any help would be greatly appreciated.

Generally the most current version (excluding an initial family release that introduces new features, like 1.5.0) is the most bug-free, since the changes incorporated are bug fixes only.
None of the versions 1.5.0_05, _06, or _07 have any known security problems.
Since Java versions are independent, unless you have a specific reason otherwise, only one version is required. Uninstall in reverse install order before installing a new version to minimize potential problems.

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First let me say I am a first time poster and hope I havent broken any rules. I am not a developer, just a home user who gets periodic prompts to update Java. My disk space is getting low and I noticed I have many versions of Java and JS2E Runtime Environment installed. I guess I assumed when I install an update, Java eliminates/overwrites previous versions. I now have over 1300 MB used up between Java and JS2E Runtime Environment. Hopefully, my question is VERY simple. Can I safely remove the previous versions wihtout totally messing up my PC? Again, please excuse my lask of knowledge regarding forum use. I'e never been in one before, and thnk you in advance for assistance with my very minor issue. I really just need the disk space!
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You can go to Control Panel -> Add/Remove Programs and remove all JRE installations.
Reboot and go to [http://www.java.com/en/download/|http://www.java.com/en/download/] and fetch and install the latest JRE.
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This is my current version from the Console Screen
Java(TM) Plug-in: Version 1.4.2_01
Using JRE version 1.4.2_01 Java HotSpot(TM) Client VM
This information is from the about screen
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I have Windows XP Media Center 2005 Edition (SP2) Intel P4 3.4 GHz, 2GB ram
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I keep most of my installations, but it's enough to keep one of each major version. I.e one 1.4, one 1.5, and so on.
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*replying to daya*
0X800736FD
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Quick quesion about installing newer versions of Java

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