Norton 360 and internet connectivity

I installed the Norton 360 upgrade about 2 weeks ago, and since then I have had periodic internet connectivity problems on 1 of my 2 PCs running the new version.  About once a day, I get disconnected from the network and am forced to reboot.  It seems to occur after periods of inactivity.  The PC having issues is running Win7 SP1 with IE11.  I am also having issues with the screen resolution changing.  Running a full system scan and rebooting resolves the issue.  The other PC is older, running XP, and has not encountered either of issues.