To buy a laptop what you have to check?

Answer 1

Im not sure what you want to use it for so here is a run down of things you could possibly use it for:

Gaming-

at least 4gb of memory, the more, the better

200gb hard drive

a good fast processor, the faster the better but at least a core 2 duo

a good graphics card, again nicer the better. get as nice as you can depending on your budget

a 64-bit Operating system (important for memory usage)

Work/Business-

2-3gb of memory

200gb hard drive

processor not as important

graphics card not as important, integrated chipset graphics is fine

32-bit OS is fine

Entertainment-

3-4gb of memory

300gb hard drive

core 2 duo processor

nice graphics card (no integrated chipset!)

64-bit OS

Hope this helps ;)