The computer will restart to remove McAfee after the uninstallation. Then go to C:Program Files and make sure McAfee has gone completely. If its folders are still there or you got error message when uninstalling McAfee, which means the registry entries, DLL files and drivers of the program are still in your computer. Exit the program by right clicking its icon on the Taskbar or open Task Manager with Ctrl+Alt+Delete to end its process. 2  Click Start menu and then Control Panel. 3  Double click Add/ Remove Porgrams and navigate McAfee. 4  Click Remove to uninstall it.