Steps:
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1) Install JRE 1.7.0
2) msiexec.exe REBOOT=Suppress /x {3248F0A8-6813-11D6-A77B-00B0D0170000} /qn
Key HKEY_LOCAL_MACHINE\SOFTWARE\JavaSoft\Java Update\Policy is note removed.
This works fine if uninstalled using UI.

Its noted that the keys upto "JavaSoft" is removed while uninstalling
but towards end of uninstall Policy key is re-created.

This same test fails for 1.6.0_01 build as well.