The problem with NIS and Windows 8.1 has been well documented, and you may be interested in Inquirers post, here.
http://community.norton.com/t5/Norto...t/true#M260956
If you then completely shut down your system, you may wish to run Live Updates after the reboot until no more are found, and THEN download a fresh copy of Chrome.
A patch has just been released which fixes a problem with Chrome, amongst other things.
.
http://community.norton.com/t5/Produ...s/ba-p/1150540