A DESCRIPTION OF THE PROBLEM :
When trying to install JRE 8u171 I got the infamous error 1603 message.

I was able to fix it so feel free to close this, I just wanted to provide some info in hopes you can resolve it permanently for others in the future. I used JavaRA and it removed two registry keys and then the install went off without a hitch.

JavaRA log file pasted below:
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User initialised redundant data purge.
......................

Removed registry subkey tree: Browser Helper Objects
Exception encountered in module [JavaRa]
Message: Cannot delete a subkey tree because the subkey does not exist.
   at Microsoft.Win32.RegistryKey.DeleteSubKeyTreeInternal(String subkey)
   at Microsoft.Win32.RegistryKey.DeleteSubKeyTree(String subkey)
   at JavaRa.routines_registry.delete_key(String key)

Removed registry subkey tree: JavaSoft
Removal routine completed successfully. 2 items have been deleted.


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