Spark Lockup

We are starting to implement spark in our corporate environment. Overall it has been fine but I have one user that when they double click the person to IM it locks up there whole computer. Also the initial load of spark is extremely slow. Is there a tutuorial to completely unintall spark, including reg key deletes and abnormal directory removals? I’‘ve tried uninstalling from add/remove programs, reinstalling JAVA, etc. The user has Spark 1.1.1 installed. The OS is Windows XP Pro SP2. I have posted what the error log. Can’'t make much sense of it.

Any ideas?

stream:error (conflict)

at org.jivesoftware.smack.PacketReader.parsePackets(PacketReader.java:315)

at org.jivesoftware.smack.PacketReader.access$000(PacketReader.java:43)

at org.jivesoftware.smack.PacketReader$1.run(PacketReader.java:63)

Exception in thread “Thread-4” java.lang.IllegalStateException: Must be logged in to XMPP server.

at org.jivesoftware.smackx.PrivateDataManager.(PrivateDataManager.java:125)

at com.jivesoftware.spark.SessionManager.initializeSession(SessionManager.java:81)

at com.jivesoftware.LoginDialog$LoginPanel.login(LoginDialog.java:593)

at com.jivesoftware.LoginDialog$LoginPanel.access$400(LoginDialog.java:179)

at com.jivesoftware.LoginDialog$3.construct(LoginDialog.java:492)

at com.jivesoftware.spark.util.SwingWorker$2.run(SwingWorker.java:121)

at java.lang.Thread.run(Unknown Source)