High Disk Read usage by: Windows host process (rundll32)

Hello. I saw this message in norton's security history which was stored while no one was logged on. I don't recall seeing this before and I'm not familar with the file name. I checked the file source and it seems to be legit. Is this anything to be concerned about? Thanks. 

Here's some information on rundll32.exe

 

http://www.howtogeek.com/howto/windows-vista/what-is-rundll32exe-and-why-is-it-running/

 

I hope it helps.