“Why are there so many refurbished computers of this model? I read a lot bad reviews of the U-series Lenovo computers: http://reviews.lenovo.com/8923-en_us/5D08D63989CA9D4724FE8D7F869D91EC_12F0696583E04D86B9B79B0FEC01C087/lenovo-ideapad-u530-touch-reviews/reviews.htm?sort=rating&dir=asc Can you please comment on the main issues people are having with this computer? How long is the warranty for buying this refurbished product?”