.exe JIRA installed in a clean xp and than in 2003; service is installed by doesn't start up if you try to do it manually you get a pop-up with error as per serviceStartupError.JPG OS system logs: The Atlassian JIRA Enterprise Edition 3.8.1 service terminated with service-specific error 0 (0x0) and Tomcat logs: [2007-05-24 14:20:19] [info] Starting service... [2007-05-24 14:20:19] [924 prunsrv.c] [error] Failed creating java [2007-05-24 14:20:19] [1179 prunsrv.c] [error] ServiceStart returned 1 if you try to start up JIRA from command you get: C:\JIRA-Enterprise-3.9\bin>startup.bat JAVA_HOME "" contains spaces. Please change to a location without spaces if this causes problems. If you encounter issues starting up JIRA Standalone Edition, please see the Troubleshooting guide at http://confluence.atlassian.com/troubleshooting+Guide Neither the JAVA_HOME nor the JRE_HOME environment variable is defined At least one of these environment variable is needed to run this program although you can still start JIRA as an application with startup_bundled_jre.bat additionally you can't unregister the service as per doc with: service.bat remove JIRA correct command is : service.bat remove JIRA240507133018