text: i have erased a trojan. my pc is still sending many e-mails to people to buy viagra. how can i stop this? i need to stop my computers sending the e-mails its blocking my system.  the trojan is gone the problem is the automatic sending of e-mails download and install avg anti virus (the free edition) http://www.grisoft.com/doc/289/lng/us/tpl/tpl01 after installing, check for updates and scan all files.  to be safe run an onlne anti virus scan at mcafee http://www.grisoft.com/doc/289/lng/us/tpl/tpl01  and also an online scan at http://www.pandasoftware.com/products/activescan.htm(panda anti virus)  and also and online scan here: http://housecall.trendmicro.com/ (trend micro housecall anti virus)