Centrus.. I bet you that you will almost double your computer speed by removing Norton..
PC Magazine has them listed almost as bad as a virus with the way it invades your computer in 4 different locations..
Most AV only installs about 64 Mb.. Why does Norton have to install over 400 MB?
Computer performance hit with Norton is 28% off the top and gets worse over the course of time.
The biggest problem Norton has is with software or patches installing to a computer.. corrupting software.
I can see how Norton can effect browsers because of this.