how do I replace microsoft security systems with McAfee? I can't find microsoft security systemns listed in regedit in Vista?

Hi, If you have Microsoft Security Essentials, you can remove it by clicking start - All Programs - Microsoft Security Essentials - Uninstall Microsoft Security Essentials. Or navigate to HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Microsoft Security Essentials and right click to delete it. If you don't have it installed, you can download and install McAfee then. Regards,Please remember to click Mark as Answer on the post that helps you, and to click Unmark as Answer if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread.