Can not reinstall Java 7 on Windows 8 x64

Hi,
Restinstalling Java 7 opens a dialog box saying that Java is already installed and should be uninstalled first. When I click on Yes to go on with unstalling, I get a second msg box saying that this action is only valid on installed products.
I tried everything: running Cleansweep to clean the registry, running CCleaner for the same purpose. Using Cleansweep to delete manually the reg entries with name of value containing "java\", deleting any "java" directory on disk (in c:\program files, c:\program files (x86), c:\commonFiles, <user>\appData\localLow and I may forget deleted locations ... Finally rerun Cleansweep ...
The problem still remains and, unless I can solve it, I will have to do a clean install of the OS (will be Windows 7 since Windows 8 drives me mad, sorry).
Though, doing a clean install will cost me money, and 1 week of time !
Will some nice person save me from this huge work ?
Thanks in advance !
Jean-Pierre

Hello,
It is odd that you are seeing a dialog saying it needs to be removed. Can you post a screenshot of that?
If a particular update version is already installed, regardless of the build number in the case of EA builds, you will see a message saying that it is already installed, you can then continue or cancel.
Why is it that you were trying to reinstall? As you called out the 64bit OS it may be the case that a 64bit JRE was installed and the JRE is not working in the 32 browser. I mention this as this is a common case. Really only IE has a 64bit browser for Windows, Chrome and Firefox are do not provide production 64bit browsers and thus the 64bit plugin will not run in those browsers. Windows 8 as a bit more of a hurdle as Java must be run on the desktop rather then the start screen and the 32bit browser, as I recall, is the default. Java.com will not provide the 64bit JRE unless a 64bit browser is being used for just this reason. Here are a few links that cover this:
https://www.java.com/en/download/faq/java_win64bit.xml
http://windows.microsoft.com/en-us/windows7/32-bit-and-64-bit-Windows-frequently-asked-questions
You can obtain the 32bit JRE from https://www.java.com/en/download/manual.jsp
To complete the uninstall there are some steps you can try this first:
http://support.microsoft.com/mats/Program_Install_and_Uninstall/en
Only if the above does not work... registry changes, be careful, back up the registry!
https://www.java.com/en/download/help/regkey_addremove.xml
Cheers,
Roger

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