Can you upgrade this graphics card?

The Intel HD Graphics are integrated into the CPU.
You can add a dedicated video card, but be aware the power supply is probably 200W to 300W.
If you do plan on upgrading the video card, I'd recommend the HD 7750 which runs in the US for a bit over $100.

Okay thank you! I was thinking to buy this pc to upgrade the power and graphics because it would be cheaper than buying the parts myself, i want to use this pc for gaming and school work. Is that card good for games like mw3 and such? Thanks again

Yes, it is.
It's a new card that just released, and it runs off of the motherboard rather than the power supply.
You won't need to buy another power supply this way.
It performs very well for it's price.
What exactly is your budget for a new power supply and video card?

P.S. Building a PC for yourself will probably be a better value option, but it's really up to you.

Suprisingly i saved around $100 with this pc i believe if i were to buy the parts, but the learning you get from building your own i realize is great.

The pc is $530, i am willing to spend around $700-$780.

Thanks for the help   I know $700 is a bit low for a new card + power. So $750+ But not too much past that.

So your max budget for the entire build is $780?
You can build a great PC with that money.
Do you plan on overclocking or running multiple cards now or in the future?

Keep in mind the $750 is including Windows 7, but yes, $750.

As for the overclocking, A slight possiblity but not for a while if so.