fix false virus alert messages
Try to look into the settings. It might be possible that some of the checkbox needs to be unchecked and your problem will be solved.
You can also try using your MCAfee in safe mode with networking and update as well as perform complete scan in safe mode. It happens sometimes that some virus hides themselves and gets caught in safe mode. This feature is available in each and every antivirus software available like Notron, Avira, Immunet Plus, Avast and many others. You can also try restoring your system and its data. Try uninstalling the recent downloads that you have done via Internet. This should help.