You also need to get rid of Norton AV as the two on the same machine are likely to cause conflict.

O23 - Service: Norton AntiVirus Auto Protect Service - Symantec Corporation - C:\Program Files\Norton AntiVirus\navapsvc.exe

If you have run the add/remove programs for Norton, it hasn’t worked fully and you need to run the Norton uninstall tool. The tool can be downloaded here: ftp://ftp.symantec.com/misc/consumer/Rnav2003.exe ensure that you are using the correct tool for the version of NAV you had, this one is for nav2003.