An incomplete uninstall of an always-on (real-time) antivirus tool/suite can create horrible difficulties and problems. Potentially, the removal process may never be complete and PC never quite back to normal. Now, you probably have redundant CPU intensive components and competing/incompatible running processes. Alternately, if you uninstall AVG, you may be able to then backup all your critical user files.
Norton does have a 'removal tool' to assist in the cleanup process (frequently necessary, unfortunately). However, many of us have also found it necessary to use several registry cleanup tools to aid in the process (for numerous orphan and missing file Norton registry references):
You can try the
'removal tool' and see how it goes. May be best to first consult with your ISP and see what assistance or suggestions they may have:
http://service1.symantec.com/SUPPORT...05033108162039
Further discussion:
REMOVAL TOOL: http://www.google.ca/search?hl=en&q=...G=Search&meta=
REPORTED PROBLEMS: http://www.google.ca/search?hl=en&q=...e+Search&meta=