You can do the following:
1. restore your backup file;
2. scan the registry with Registry Healer;
3. look through all found registry entries and find entries that have words "Norton" or "Systemworks" in registry paths.
4. add these entries into the excluded list - right mouse click to pop-up menu and select the last command Add the entry into the excluded list.
5. scan the registry with Registry Healer again, be sure that there are no entries with "Norton" or "Systemworks" keywords found and correct the registry.
Also, please send us your found Norton's registry entries with detailed description of the problem - what applications do not start, do not work properly, etc..