Found this directory (and a removal tool) on the ESET website that may be a valuable resource to you. ESET is a leading IT security company that specializes in various antivirus and security products. If you are interested on trying ESET, there is some good deals on their products (click here)The directory on their support site is what jumped out at me, which outlines various antivirus and security software brands with links to those sites to access instructions and/or tools to uninstall their antivirus software.
Why is this important? Prior to switching to other brands of antivirus or security products it is HIGHLY RECOMMENDED that you uninstall the older version to prevent conflicts, system slowdowns; and even system failures. You may think, “OK, no problem, will use the Windows Program Uninstaller applet in the control panel to do this”. You are on the right track, but the problem with that is the Windows Uninstaller may not capture and uninstall everything; and could leave remnants of files behind that can cause problems. This is where the directory on the ESET website will really come in handy to assist you with the removal of antivirus and security products.
ALSO, on the same note, I noticed ESET also has a removal tool on the same page that my do the heavy lifting for you in removing an old software product. The ESET AV Remover tool will remove almost any antivirus software previously installed on your system. ALSO, you will find a link for a list of available malware removal tools.
Source: ESET Support – Uninstallers (removal tools) for common Windows antivirus software