Conflict with NcAfee Security Scan Plus

Hi there!

Since installing the Norton 360 upgrade, I have had an error message a number of times telling me about a clash with McAfee Security Scan Plus. However, when I try to uninstall this Norton AutoFix or directly using Windows uninstaller, it does not work. Can you tell me how to remove it or, at least, to deactivate it so that the error messages stop? My machine also appears to be running much slower since installing the update. Is this normal?

Best regards and looking forward to hearing from you soon, John.