I've moved this to the Virusscan Enterprise forum for attention.
This is an error in a scheduled scan by Virusscan enterprise. If you access the virusscan console from the start menu you should be able to see the uncompleted scan as a task and check its log.
you can run a check tool to see if there are any issues with your installed Mcafee software from here: http://www.mcafee.com/uk/downloads/free-tools/virtual-technician.aspx
Some more information on this would be usefull, I can see from the file names you are running VSE 8.8 patch 1 but what is the DAT version and have any hotfixes been applied.