Quicktip: How to Completely Uninstall Norton 360 from Your Computer
If you have a virus on your PC, it might corrupt your Norton 360 installation, making it virtually impossible for the native Windows “Uninstall a program” utility to properly remove it.
The good news is the folks at Semantec (the company that sells Norton antivirus products) have a great free tool just for handling situations like this. It’s called Norton Removal Tool, and it does exactly that (and it does it quite well).
Download the Norton Removal Tool from this page and give it a try.