Instruct: Classify Amazon reviews into positive or negative sentiment
Query: 5 stars (but it has a problem)

This product is great. I don't mind that it is used. However, when I got it it could not boot up. Something bout no OS (operating system) available. It didn't bother me because I was going to junk the win2000 NT professional OS that came with this laptop anyway. So I installed a WinXP home ed OS I it worked perfectly.