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Java update problem


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#1 calden

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Posted 21 February 2011 - 10:01 AM

Cannot update Java on Windows 7 64bit from version 21 to 24.
A message appears stating "Windows Installer" problem
and the features you are trying to use are on a network
source that is unavailable.
Java setup states "Error 1721"
It is not possible to delete Java version 21 in programs.
Microsoft do not have a download for Windows Installer version 5.0.
They only have version 4.5 which is for an older version of windows.
any suggestions please.

Edited by calden, 21 February 2011 - 10:53 AM.


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#2 etavares

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Posted 27 February 2011 - 09:47 AM

Hi,

Do you have XP? See this article from MicrosoftL
http://support.microsoft.com/kb/891985

Sun is aware but doesn't have a solution.
http://www.java.com/en/download/help/error_1721.xml

You may also want to post in our other sub-forum Am I infected? What do I do? to see if malware could be causing this.

Others had also success using Revo Uninstaller (Free Version) to remove the old version of Java. After that, you might be able to install the most up to date version of Java as normal.

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#3 tg1911

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Posted 27 February 2011 - 01:12 PM

Something else you may want to try:
JavaRa

From the Documentation

What JavaRa does is to check if your computer has the latest version of Java Runtime Environment (JRE). If the version you have installed has been superseded by a newer version the program will download and install this newer version for you, by running Java's update program. JavaRa then allows you to remove all possible older versions of this program.


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#4 calden

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Posted 27 February 2011 - 05:28 PM

Problem solved

I am on windows 7. I had already tried Revo to uninstall Java.
Also I had used JavaRa,again without success.
Microsoft used to have a software package no longer available
called "Windows Installer Cleanup Utility" The latest version
being 4.5 whereas W7 needs version 5.
I downloaded 4.5.(you have to state you are an administrator)
or impossible to download as microsoft block you.
Deleted all Java in W.I.C.U 4.5.
Then used JavaRa to reinstall Java successfully

#5 tg1911

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Posted 27 February 2011 - 05:32 PM

That's good to hear, calden.
Thanks for posting back with the fix. :thumbup2:
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