Missing updates & javascript errors PLEASE HELP!

Everything was fine till a few days ago. I first noticed mcafee real time scan being turned off then javascript errors popping all over online. I was told by a mcafee online assistant that it is an update issue - either missed updates or ones that did not install correctly. I can not get the windows update website to properly display due to sme active x control not set right but when I click on the IE information bar as instructed I do not get an option having to do with active X. Can anyone here please help solve these issues? I am more of an appliance operator then a tech but if given a detailed set of instructions I often fix things myself. XP - Dell P4 second hand machine