Win Installer does not handle out of disk space well

Today we ran into a problem with the installer of Java Web Start under
Windows. Unfortunately this happened in a demo at the customer site where
we wanted to demonstrate how easy it is to install and use Java Web
Start. When the machine is running low on disc space the installer does
not generate an error message. It simply does not install the JRE 1.3
completely. In one case we had the VM installed but non of the class
libraries and in another case it wouldn't install JRE 1.3 at all. It took
us a while to figure out what was going on and the demo was busted.