Instruct: Classify Amazon reviews into positive or negative sentiment
Query: If you must...

I decided to update my antivirus only to find that Norton is worse than what I remember. It slows down my entire computer. And when it finds a virus, it can't close it on its own sometimes. In the middle of my school work I have stop and do a scan, which took over an hour.The only good thing is that it has caught a lot of virus here and there, but it's still too annoying and cumbersome to use. I regret getting it. I should have stuck with something else.