MANY Rundll32.exe in history!

Whenever I do a scan in nis 09 Rundll32.exe pops up for like 2 seconds in task bar and uses around 50%, It seems as though it only shows up ehen Norton is scanning for cookies? If the Norton scanner finds cookies then there will be a log of windows/system32/rundll32.exe is preparing to accesss the internet RISK-LOW whats going on here?

 

ps- this is a brand new computer with vista premium