A laptop should have core i3 2.4 or up ghz processor because it will open any file or anything faster and it will not hang after the load of too much caches. That laptop should have 4gb ram and 2gb nvidia graphic card by this u can play high graphic games without lag. 6 cell battery should have of 3000mah or better.its hard disk space should be 1tb or better by this hard disk will not take to much load by this your laptop will run smoothly and u can buy this type of laptop to the range of rs 3000