Hi,
Today I found that if I re-execute the installation of jdk-8u151-windows-x64.exe, it will delete my last jdk8 installation home directory from system, even if I didn't go further on the installation but cancel the installation at the very beginning.
It caused I lost all certificates I added into the JRE cacerts.
It seems like we are not able to re-execute the installation again on the same system. The installation will read the JAVA_HOME system variable, and remove the folder assigned to the variable after user ends the installation wizard.
Best regards,
Rick