Problem with computer stutter

Hi,

 

Lately I renewed my Norton 360 antivirus by buying a new disk and going the round-about way of re-installing it onto my windows 7 laptop. However within 24 hours of installation my laptop has devloped a stutter, where internet pages take longer to load, the scroll bar freezes up, typed words are delayed, and overall every funtion I do while on the internet is slowed/delayed by a good 5 seconds sometimes. On occasion it gets so bad my web pages become unresponsive. It honestly is a pain.

I tried various online quick fix methods but nothing has worked, and this problem has only occured after I installed Norton 360.

 

Is there something else I can try to fix this? I really need some help.

 

 

Thank you.