Notification area - small annoying problem

McAfee icon is first icon in notification area of taskbar (left of clock)
and it disappears every once in a while. Have run Kelly's fix to keep same
icons in notification area on reboot. When this icon disappears I click
'show hidden icons' and the McAfee icon reappears. I click 'hide' and the
McAfee icon disappears. I repeat this procedure but left click once on the
McAfee icon and all is well for the next week or so. Last time happened I
was running IE, Outlook 2k and Word2k. Anyone else notice this?
TIA Dan