Google Chrome and NIS2010

I've just downloaded and installed google chrome.  Am I protected by NIS2010 when I use this browser for surfing etc?

 

I have yet to download IE8 (currently on IE7) presumably this would be fully protected by NIS2010.

 

I find chrome very fast compared to IE7 and am wondering if going onto IE8 will also quicken up the speed.

 

Thanks