Windows popping up saying high memory usage by internet explorer & high cpu usage by VZAcesst

Since I up graded norton I'm getting windows popping up saying High Memory Usage by Internet Explorer & Hugh CPU Usage by VZAcesst..  I have a gateway laptop & use Internet Explorer.  I use a Verizon broad band card and am allowed 5000 MB a month.  With these windows popping up I'm really eating up all my MB's real quick!  I'm new to computers & don't know much about them. Can anyone help me out?

                                                       Thanks  Andy