I would probably take a look at the on Access log to get the details and then see what is going on there. These warning, are you getting them as pop ups or just alerts on the McAfee shield ?
They're actually Windows events. Several are being logged every minute without a letup. One thing that may be related is this server is nearly out of space on drive C. In fact, we couldn't even install the last Windows update without clearing some space for it.