Instruct: Classify Amazon reviews into positive or negative sentiment
Query: this was the worst product I've ever bought!!! And I own a Dell!!!

I was really excited the day I got this burner, but I wasn't expected so many problems for so many hours. It's probably a compatibility issue with Windows XP, but why is this the case if it's a new product? The company has no helpful troubleshooting documents or services, the software they give you is unnecessary, and I'm just getting madder and madder just thinking about how long it took to figure out it wasn't going to work! Don't buy it if you have Windows XP.