Remove your existing antivirus software.
To remove your existing antivirus software perform the following steps:
1. Click the Start button and select Control Panel.
2. Click on the Uninstall a program option under
the Programs section of Control Panel.
4. After you uninstall your antivirus software you may have to reboot your computer. Immediately after you uninstall your AV software and reboot make sure you install McAfee AV software so your computer is not vulnerable to virus activity