Instruct: Classify Amazon reviews into positive or negative sentiment
Query: 0 stars! Used to be faithful Norton user - never again!

I have been a Norton customer for years. I updated to Norton Internet Security 2006 on May 1st. It loaded okay and seemed to be working. However, my computer was slowing down over time. Two days ago, it basically came to a halt, showing 100% cpu usage with windows explorer. I was finally able to uninstall Norton and everything is fine now (no thanks to Norton's customer no-service)!