FULL PRODUCT VERSION :
java version "1.5.0_10"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.5.0_10-b03)
Java HotSpot(TM) Client VM (build 1.5.0_10-b03, mixed mode)

ADDITIONAL OS VERSION INFORMATION :
Windows XP Pro SP2

EXTRA RELEVANT SYSTEM CONFIGURATION :
System has Netbeans 5.5 and Apache Tomcat 5.5.20

A DESCRIPTION OF THE PROBLEM :
During the installation of the JRE 6 Update 1, I get the dialogue box reporting :-
Error 1406. Could not write value INSTALLDIR to key \Software\Java Runtime Environment\1.6.0_01\MSI. Verify that you have sufficient access to that key, or contact your support personnel.
[Abort] [Retry] [Ignore]


I opt for the custom install and choose the folder R:\Java\jre1.6.0_01\. There is over 11GB of disk space on R and over 3GB on the system drive (C).
I have tried with both the online update and the downloaded jre-6u1-windows-i586-p.exe file and both report the same problem.
I am logged as an administrative user and should have full rights to the registry.

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Run the JRE 6 Update installation exe on a WIndows XP Pro SP2 PC and choose custom setup and select a different installation drive.

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
The update would install without any error dialogues.
ACTUAL -
Error 1406. Could not write value INSTALLDIR to key \Software\Java Runtime Environment\1.6.0_01\MSI. Verify that you have sufficient access to that key, or contact your support personnel.
[Abort] [Retry] [Ignore]


ERROR MESSAGES/STACK TRACES THAT OCCUR :
Error 1406. Could not write value INSTALLDIR to key \Software\Java Runtime Environment\1.6.0_01\MSI. Verify that you have sufficient access to that key, or contact your support personnel.
[Abort] [Retry] [Ignore]


REPRODUCIBILITY :
This bug can be reproduced always.

CUSTOMER SUBMITTED WORKAROUND :
None found