Norton Internet Security sometimes does the same thing, but it requires a full reboot before it will behave. Fortunately, they don't do this often.

The flaws affect the following packages: Norton Internet Security and Norton Internet Security Professional 2002, 2003 and 2004; Norton Personal Firewall 2002, 2003 and 2004; Symantec Client ...

Norton AntiVirus 8.0 provides Auto Protect, SafeZone scanning and repair, LiveUpdate scheduling via Norton Scheduler, and command line scanning.

It includes Norton Utilities for Macintosh (NUM) 6.0, Norton AntiVirus for Macintosh 7.0, LiveUpdate 1.6, Dantz Retrospect Express, and Aladdin’s Spring Cleaning.

If you are having problems installing Norton Anti-Virus under Mac OS X 10.3.x, you may need to uninstall the previously present copy (NAV 9.0.0) for the "LiveUpdate" component to properly perform ...

I finally decided to use Norton AV2002 with my XP box. After downloading and registering the package, I tried the Liveupdate. It repeatedly failed after starting to download the files.

The buggy patch was released last Wednesday and was automatically installed on systems running Norton 2009 and Norton 360 using the company’s LiveUpdate system.