NIS 2012 slow opening IE 9 only from home network

I upgraded to NIS 2012 on my new Dell Lattitude laptop.  When I am on my home network, the first instance of IE9 that I try to open takes 30 seconds to open.  Once an instance is open, and kept open, I can open another tab or another instance with no delay at all.  If I close all instances of IE, and then try to open a new one, it too takes 30 seconds.  My network is all at the trusted level.

At work, the same laptop opens IE9 first time every time very quickly.

I am really at a loss as to what might cause this strange behavior only on my home network.

Thanks for any help.

 

 ....Rich