Uninstalling always leaves remnants behind....
You could go here and seek help cleaning up left-behind files: http://forum.avast.com/index.php?board=4.0
They will help you even if you do not have Avast! antivirus on your computer. Be sure to state what you used to remove the program and follow the guide here: http://forum.avast.com/index.php?topic=53253.0 and attach all logs. Option to attach is in lower left-hand corner under "Attachments and other options". Click that, and your options will open.
Remnants are important because a file left behind could still contact it's master's control server, and download new malware.