Graphics card manufacturers are constantly looking for ways to make their cards perform better. Games rely heavily on the graphics card to run. Driver updates are how they adjust the way the graphic card deals with the data the game send to it, so updating those gives you the best performance Nividia, in your case, has managed to find for that card.
As for running at 60 FPS on ultra, no. Your Processor is 2.6 Ghz speed so that's going to slow things down somewhat. 3.5 or better would get you closer to that ideal.
That's also a laptop and, even Nividia mobile graphics cards are more compact and, not as strong as their desktop counterparts. That's true of ANY laptop.
Laptops, because of their compact design are also more prone to overheating. They simply don't have room for the larger or extra fans and cooling systems desktops have. The higer the graphics settings in the game, the more work your computer has to do and, the harder it works, the hotter components inside get - a bit like you working on a hot day, the harder you work, the more you sweat. Only computers can't sweat to cool off, they only have air circulation to cool them. A laptop simply cant circulate as much air inside itself as desktops can.
Cooling pads, playing games in a cool room and, keeping the laptop on a hard surface all help it to cool better but, pushing it close to its limits, like Ultra setting would do is still going to generate a lot of heat and, too much heat can cause various parts, usually the graphics card and processor, to fail either immediately, or a lot sooner than they would if they were never overheated.
