How to stop lagging on steam games?

I only started playing games on my laptop its a toshiba satellite L500 and i got arkham asylum on it.

its not only happening to that game but when i play dc universe online, minecraft etc.

any help?

rock star420

If it's happening for every game, online or off, it's almost certainly your computer.

maybe you have stuff running in the background taking up resources. Or maybe you need to update your video card's driver(s). Impossible to tell without more information, sorry.

grandfather raven