Slow Internet after installation Norton Internet security

Very frequently I have problems with Internet. It started after installation Norton Internet security. Periodically during the day it takes a minutes to load pages like www.google.ca, etc. At the same time when I have a problems another home laptop that uses Rogers antivirus protection for Windows 7 and  the same Linksys router works perfectly with Internet. I decided to buy Norton protection because now Rogers Internet provider doesn't have yet Rogers antivirus package for Windows 8. I have laptop TOSHIBA, OS Windows 8, Processor i5-3230M, CPU @ 2.60GHz, RAM 8.00GB, Hard Drive 1000GB

Alexander Kosorukov,

Toronto, Canada.

August 21, 2013