stdrt.exe will not stop tryin to acess the Internet, even though a custom rule has been created

The behaviour of this process is very anoying.  If left to connect to the Internet it will use all of my data allowance, doing what I do not know.

 

I have set up a custom Firewall rule specifically for stdrt.exe, but i get hundreds of Norton pop ups asking what action I want to perform, one after another.

 

3-04-2012 2-48-04 a.m..png

 

Please advise how to stop this process?

 

yhanks in advance.