Downloaded SpyBlaster (I got rid of AVG because I thought you had said the rule of thumb is One protection per One computer
No, I said one ANTI-VIRUS program per computer, that was when you were running two of them, McAfee and AVG. SpywareBlaster is NOT an anti-virus program. You need ONE anti-virus program on there so put your AVG back on.
Reinstall AVG and then run a new HJT scan and post the log and I can better tell you how to stop the MySpace IM.
Judy