Try to update from 6u5 to 6u6 or 6u7 using IFTW bundle

1.) Install 6u5 (Normal installation)
2.) Install jre-6u6-windows-i586-p-iftw.exe

Update will fail during installaiton itself. Error screen shots are Attached. After clicking "OK" on 3rd screen, the update process tries to rollback. After clicling the finish button in "Instalation Failed" wizard, try to open an applet in IE, IE will crash.

The same behavior can be reproduced with normal bundle as well.
1.) Install 6u5 (Normal installation)
2.) Install 6u6 (Normal installation)

Update will fail during installaiton itself. Error as shown in attached PIP_Error3.jpg.

Testspec:
http://sqindia.india/disk17/deployment/rakesh/install_performance/Install_Performance_TestSpec.html#tests_testcases

TestID- WIP001-001, WIP001-002, WIP003-001 and WIP005-002 are failing.

I have used following bundles for the PIT testing
6u5 build: http://j2se.east/plugin/1.6.0_05-pit/2007-10-20.11_38
6u6 build: http://j2se.east/plugin/1.6.0_05-pit/2007-10-22/
6u7 build: http://j2se.east/plugin/1.6.0_05-pit/2007-10-22.12_00/