The fight is over the display of technology that helps Vista owners manage the security tools on their PC. Symantec, McAfee, Check Point Software Technologies and other companies want Microsoft to change Vista so their products can easily replace the operating system's built-in Windows Security Center on the desktop. But Microsoft is resisting the call. "By imposing the Windows Security Center on all Windows users, Microsoft is defining a template through which everybody looks at security," Bruce McCorkendale, a chief engineer at Symantec, said in an interview. "How do we trust that Microsoft knows what all the important things about security are to warn users about?"