When l was in primary school,l had my first computer.From the point of now,it was so heavy and ugly.But for me at that time,it was amazing.Its OS is Windows XP,I think stability is its greatest feature.It also has other advantages such as the simple operation system,comfortable interface and almost suit for all softwares.And now my OS is windows 10,compared with XP,it is more diversified and complicated. But it's earier to operate.You can search something you want to find.And it makes a efficie