On Windows, you need to download a JRE 32-bit (there is no restriction about the version), install it and then copy the content of C:\Program Files (x86)\Java\jdk1.7.0_60 into
"weasis-portable/jre/windows".
If a JRE is installed on the machine which runs Weasis with a embedded JRE, the JRE installed locally will be used in priority.