I have been trying to install jini2.1 on my Vista machine but it always fails at the last step with the error message: "Some serious error occurred." I cant seem to understand the problem here. I have been using the same installer on my office machine which has Windows XP and it installs fine. The problem is, the files and the directories for Jini2.1 are created but the launchall option (which is also a shortcut) for starting the registry server is not created. Does anyone know is this problem specific to Vista or am I doing something wrong. Further, I tried installing Rio (with dependencies) which contains Jini in the bundle, but that also fails. Thanks.