hi there i'm Chandu i'm using 64 bit OS of Windows 7 and I've 4 GB of RAM and 2 GB of Intel G41 express chipset family graphic card and my processor is Intel(R) Pentium dual core processor (3.0GHz ) but the problem is my video memory is only 128 MB I want it to increase up to 512 MB because i'm unable to play the HD games in my pc please send me the required software link for it or send me the information about it