title: PC is configured properly but .jar files still won't run
body: <p>When I make a .jar file using BlueJ, it runs fine on both of my PCs (Notebooks)-one is running Windows Vista the other Windows 7 -but not on a different PC running Windows XP. This third PC does have the correct file association and a JRE. No error is displayed, the critical stop sound plays but there is no other activity.</p>
  
  <p>The real question here is why did a standalone JRE work in Windows 7 but not Windows XP?</p>
  
  <p>How can I be sure that people I write programs for can run the jar file without having to install a JDK? A JRE was sufficient for my Windows 7 pc, why is this not always the case?</p>