I buy dell laptop.it is good.hd screen ram rom processer all things are performance best.this laptop not hang with virus.harddisk space are near about 600 gb.this laptop video quality is very good.and this laptop also compatiable with window ten window eight point one window eight.this laptop music quality are steriopkonic.internet connectivity is good.long battery backup.laptop camera stength is good for video calling through skype.this laptop is good for cs student bussinessman.