I was recently helped by a member to remove a trojan and fix the resulting damage (link here: http://www.bleepingcomputer.com/forums/topic267033.html)
Everything has been running fine. Today I keep getting a message from my McAfee AV software that the trojan DNSchanger!ca was automatically blocked and removed. I get this message every 5 minutes and it automatically results in the closing of internet explorer 8. The location is listed as C:\\windows\system32\tdlwsp.dll. I've run superantispyware, a McAfee scan, spybod search and destroy, microsoft malicious software removal tool and Malwarebytes but nothing is found. I don't know if I have this trojan already or if it really is being blocked...every 5 minutes! I don't know if this is related to my past problem. Can anyone help me determine if I am infected and how I should deal with this? I have a Dell PC running XP SP3.
Thanks to anyone willing to have a look,