So I downloaded Battlefield Heroes to keep my mind off of Christmas cause I got bored of all my other games, and after a minute or two of gameplay, battlefield heroes keeps minimizing. I looked it up on Google, and the only answer I found was to turn off all background apps, but nothing else is running. Please help 
Computer Specs:
Model: Lenovo SL500
Operating System: Windows 7 64 Bit
Graphics Card: NVIDIA GeForce 9300M GS(Battlefield Heroes runs fine with my Graphics Card)

Computer Specs:
Model: Lenovo SL500
Operating System: Windows 7 64 Bit
Graphics Card: NVIDIA GeForce 9300M GS(Battlefield Heroes runs fine with my Graphics Card)









