cannot access Google toolbar

After Comcast Norton Security Suite was installed on my computer I cannot access Google toolbar. The person that installed it for me said a message came up and essentially stated something else is performing similar functions and would you like to disable it he clicked yes. After that I cannot get the Google toolbar to show up on my Internet Explorer version 8 browser. Google just shows up in the top right corner of the browser but I don't have access to all the options. I uninstalled then installed Google toolbar and I have followed the directions at Microsoft Windows to fix the problem and it still doesn't show up even though there is a check mark next to Google toolbar in the toolbar menu.