I had a similar problem. avast Home Edition and pieces of the Norton SystemWorks 2003 (except NAV) were incompatible! The solution was manually editing two Registry keys (apparently corrupted by Norton Anti-Virus Removal Utility).
Here we are! First of all, take it easy, relax, it’s a long journey… 8)
Do you have a XP system, ok?
Try to run avast! and clean your system before you go ahead…
- Desinstall all Symantec Products (LiveRegistration and LiveUpdate included).
- Boot.
- Delete any folder related to their products: C:\Program files\Symantec, C:\Program files\Common files\Symantec Shared, C:\Program files\Norton SystemWorks
- You will need a Registry Cleaner to remove the ‘trash’ left by Symantec.
There is a good one here. It´s no more a freeware but you can use it to clean your system untill it expires.
- Run Norton Anti-Virus Removal Utility.
- Boot
- Install avast! again
- You are almost there! Clean your system (through scan).
Tomorrow I’ll teach you how to delete some ‘invisible’ trash left behind by Norton… 8)