How many Java in control panel??

Would like to know how many Java I should have in add/remove programs (control panel -WinXP)
There is: Java2 Platform Standard Edition Runtime Environment Version 5.0, SE v1.4 2_13, JavanPlatform, Standard Edition Runtime Environment Version 6.0.30, then Java 2.0 download manager.
Also,after 6.0.30 installation I have problem with opening .pdf documents from any website. I have Adobe pdf 6.0
Please help, as I don't know what I should do ! Many thanks.

Sara84 wrote:
Would like to know how many Java I should have in add/remove programs (control panel -WinXP)In my opinion, 1 or more. But you could have 0.
There is: Java2 Platform Standard Edition Runtime Environment Version 5.0, SE v1.4 2_13, JavanPlatform, Standard Edition Runtime Environment Version 6.0.30, then Java 2.0 download manager.Okay
Also,after 6.0.30 installation I have problem with opening .pdf documents from any website. I seriously doubt this has anything to do with your Java installation.

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