Laptop users need to be aware that this is a very demanding game and is probably not suitable for your machines.
For a start, please look at these pages which show the minimum system requirements
^^Note this is for the free version.^^
^^For Arma2, Arrowhead and Combined Ops^^
It's good advice consider the recommended specs
as a basic starting point.
Why? This game sucks up GPU power. Your integrated graphics card cannot cope, I guarantee it.
It's even harder on your CPU. Your mobile branded CPU might have a half decent speed rating, but your GHz are cut down, low power ones. Not nearly man enough for this game.
It drags a lot of data from the hard disk too. All those lovely graphics come from the hard disk. If that's a mobile 5,400 RPM spinner, it aint going to look good.
In a laptop, all of the above means HEAT and that's bad.
Sure, you can run the game on low settings and it might
work, but it'll look like crap. It'll probably lag like crazy and your AI won't work properly. You'll get crashes, errors and all kinds of heartache. You'll get pwned too, by the zombies and the other players.
Sure, some laptops do make a decent job of this game, but these tend to cost more than £1200 / $1,000 / €1,500.
So, in conclusion and in short. If you want to play this game, get a desktop. A good one.