Using Disk Cleanup Utility to remove Downloaded Program Files -Question

I understand the process of how to remove downloaded Active X controls using the Disk Cleanup Utility.

My question is, exactly how many versions of the same Active X control do I need to keep?

For example, I have 3 Java Runtime Environment 1.6.0 controls showing in the list.
Two of them were installed on 07-28-2010 and are both for updates. They appear to be the same kind of control as each other.

The third is called "Classic Java plug in for Netscape and ..?' which I don't know where that came from....if it was an option in an update, I didn't choose it. I wouldn't choose that because I don't have/use Netscape. It was installed on 2-2-2011.

Can I remove the classic plug in for Netscape and one of the other update controls?

Thanks!


p.s.....I am utilizing your suggestion page about "Slow Computers/browser ..check here first". this is where my question originates from. I run XP Professional Service Pack 3.

In order to remove older Java Installations we recommed this: JavaRA it remove all older versions of Java.

Thank you.