Lagging

[Wooderson]

What he might mean is that he's using up a lot of memory because of programs that he doesn't use much. This can cause some problems, but whether it would make you lag that sudden i'm not sure.

Are you sure that your laptop is still running in High-Performance mode? I wouldn't be suprised if it had the ability to switch when it needs to. And yeah, Intergrated graphics cards aren't great for playing any game really.

Other than that, I don't have a clue what could be wrong unless you need to update something.