Vista + McAfee Problem??

I dont know if I have a problem but when opening McAfee Security Centre selecting View Recent Events then View Log then expand Internet and Email I can click on Inbound Events.This shows a series of entries identifying my computer has attempted to make unsolicitated connections to UDP port 28040 on my computer.There are groups of 9 or 10 entries at the same time to this and other ports.These occur every hour or so.There is no problem that I know of and it may have been happening for months because I have only just looked.

I cant understand how my computer could make INCOMING attempts to its own ports.I also thought unsolicited attempts could only be made from the outside.Nothing shows for Outbound Events or Intrusion Detection.

Has anyone looked to see if they have the same thing and any idea what it means?? Its a Dell E520 bought 07/2006 with McAfee pre installed and Vista home premium