Computer keeps freezing. Norton keeps popping up all the time and then freezes on that screen

Getting a screen from norton 360 that says that low tracking devices have been found and when I click to apply all. It freezes cant do anything. Have to shut down the computer. Then this morning it would not start after restarting. Started maybe after the 10th time. Seems like some viruses or something, not sure. Thought I would ask the experts.

Any help would be appreciated.

Thanks

kim