Hi I have a stand-alone PC with a broadband connection that has been hijacked by a trojan. It is now getting messages returned from strange email addresses that I have not sent to. The PC is now a zombie spam server. How do I get rid of this. I updated and scanned with Panda Antivirus, Ad-Aware and PC Doctor, and the messages have been reduced in number from about 50 per day to about 5 per day. help, how do I get rid of this, please?