Unable to Browse and adapter not recognized since installing NIS 2010

I installed NIS 2010 about 2 weeks ago (an upgrade from 2008 which worked fine) and it was running OK until 3 days ago.

 

 Since then I have not been able to browse the web on my own home DSL modem.  Neither Internet Explorer 7 or Safari for windows works.  The pages won't load (except I can access Google only but no pictures). The browser does not even recognize the modem's own IP address.  When I ping a website from the command prompt it pings fine.

 

Despite all this I am able to connect normally to my neighbours wireless networks and my work wireless hotspot.  I started going between the work one and my home one recently prior to the problem. 

 

Basically I'm locked out of my home LAN since getting NIS 2010.

 

I have Vista Home Premium, 32 bit.  Dell Inspiron 1520, 3g RAM, ample HD space

 

Any help please? Thx