Problemm with http

Hi all and happy new year. I have a problem, when i connect with internet explorer 7 my browsing is very slow 5 minuts for open a html page. I dont know why i dont touch my setting is deafult with kaspersky 6.0 if disable the security service my browsing is very fast. My sistem is win xp with 1gb ram and centrino duo can help me?
Tnx and sorry but my eng is very bad.