Running two antivirus products on the same computer can degrade performance and cause system instability. It is important that any previously installed antivirus software is uninstalled from your system before installing a new security product. Typical uninstallation using the Windows removal tool (Add/Remove Programs) is often insufficient, and for that reason we have specialized uninstallers.
Note: You will be prompted to restart your computer. You must restart your computer in order to completely uninstall Windows Live OneCare.