JBoss ON agent update fails with the message "Unable to delete directory C:\JON\rhq-agent\bin"

Issue

• Failure when updating agent: "Agent is dead and cannot recover";
• JBoss ON agent update fails with the message "Unable to delete directory C:\JON\rhq-agent\bin"

• Attempt to update JBoss ON agent fails with the message as below:

  jar:file:/C:/JON/rhq-enterprise-agent-4.12.0.JON330GA.jar!/rhq-agent-update-build.xml:216: Unable to delete directory C:\JON\rhq-agent\bin