Because of tight integration with the operating system, a typical uninstallation using the Windows Add/Remove program is often insufficient for removing security programs from your computer. There may be leftovers or registry entries, which may prevent another security application from installing on your machine. Moreover some antivirus programs like Norton required password for uninstalling, if you have forgotten the password, the only choice left for you is formatting the hard disk. But here is a freeware (portable) tool called AppRemover that helps in such situations.
Ok that almost all security software has its own uninstallers available for downloading, but this tool covers almost all security applications from McAfee, Norton, ESET, Trend Micro, Kaspersky and more.
It enables users to remove antivirus and other applications as well as left over files from incomplete uninstallations. There’s no more need to mess around with your registry.
Download AppRemover at source (For Windows 7, Vista and XP (32/64bit)