Considering that the way to install JBossAS is to download and unzip a zip file, there are only two ways to tell if someone has JBossAS in their machine: 1) if JBossAS is running, you can try connecting to one of the ports (such as JNDI) Of course, they can change the ports used, so this is not a goo solution. 2) Scan the hard drive. You could do a quick-scan to initially look for JBossAS in "typical" locations, and if that fails, scan the entire file system. (I actually wrote code like this once!) View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4116008#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...