I had Norton 2000 and 2002. When I got Norton 2003 I installed it in all 3 computers on the same night. The first two (XP Home and 98 SE) went fine. In 98, something went wrong during the installation. The installation is automatic, it's not that I did something wrong. I could not turn on any virus protection within the program. Then I find that the computer could no longer show a thumbnail in Window's Explorer, or run a movie, or even show a file name to insert a photo into an e-mail.
Norton sent me a VERY lengthy process to uninstall and reinstall their program, but had no advice on how to correct the problem.
When I need a .Jpg in it, I need to access the files through my local network.
Just one more warning. Anytime you install a new program, get your files backed up.
Included with Norton is "Go Back". If I had it then, I could have undone the install, and just paid for another year of virus definitions.
Roxio Go Back is in all 3 computers now, and it saved my butt big time, twice already.