Iphone update on laptop will not work since loading Norton

My daughter has an Iphone which has to be updated weekly. She uses her laptop to download the Iphone updates. Apparently the Norton Anitivirus that she downloaded two weeks ago will not allow the Iphone updates.

 

Is there something in the Norton program that has to be turned off to allow the Iphone updates to download? Or will she have to remove Norton, update the cell phone then reinstall Norton after the updates are complete?

 

Or will she need to purchase a different virus software?

 

Thanks for the help or suggestions.