1. Download the Norton Removal Tool, saving it to your desktop:
ftp://ftp.symantec.com/public/english_us_canada/removal_tools/Norton_Removal_Tool.exe
2. Close all open applications (i.e., anything with an icon on the taskbar).
3. Right-click on the file you saved in #1 above and select Run as Administrator to run the utility. Don't TOUCH your keyboard until the run completes, then reboot.
4. Uninstall AVG & reboot, then do a fresh install of AVG: This time select the CUSTOM install option and do NOT install (i.e., uncheck) Linkscanner, Search-Shield, Active Surf-Shield, Security toolbar (none of which are IE8-compatible IMHO), or any of the
email scanning components.