I can't always get it to install either. The most recent problem I had was it quit after a systems update and I never could get it working again. I've had the same problem with Trend but not as bad. And I am a programmer.

Norton is a hog for one thing but also has caused random problems for us including BSODs. Some systems don't want to restart the service after reboots but beats me why.

But the biggest problem we have is clients allowing stuff in.