Where can I buy a good lap top computer, say acer brand with genuine windows in beijing

Zhongguancun in Haidian District is the most famous area at which there are lots of special markets selling electronic and digital products, such as Zhongguancun E Plaza, Hailong Digital Market and Saibo Digital Plaza. You may go to these plazas to buy the lap top computer, but remember to be careful about the quality.