After unzipping the installation files you would probably see this in your directory:
"Could not extract the archive since it is corrupted. Error code=1"
Resolution: One workaround to this issue is simply unzipping the .exe file using 7-zip
Now the installation directory should look like this:
Go ahead and perform OBIEE12c installation from this directory:
Disk1>"c:\Program Files\Java\jdk1.8.0_65\bin\java.exe" -jar install/modules/ora-launcher.jar