It's not good for gaming, but may run some in med or low resolution. If your game runs, I recommend a laptop cooler that sits underneath and blows air up. They usually cost $15-20; some are much less after rebate at frys or newegg. For anti virus, I use microsoft security essentials, a free download.
but on "can you run it" website it says I have the recommended stuff for crysis.
also, I heard that avast was better than MSE