Fail to install JavaFX runtime when installing FX SDK on windows 7

Reproduce steps:
1. install required JDK
2. double click JavaFX SDK installer and go through installation.

Expected: when installing JavaFX SDK, it should invoke runtime installer and install it.
Actual: JavaFX runtime installer did not appear and it was not installed.
Open the task manager, you can find 2 processes "fxruntime.exe" and "fx-sdk.exe". But they just hang there and runtime was not installed.

This issue can be reproduced on both window7 Ultimate 32 and 64 bit