Blue Stacks V 0.9 installation problem

Why am I having problem while installing the latest version of blue stacks 0.9? It says something like low graphics when I have an NVIDIA 9800 GT. Why is the problem occurring? Have I downloaded some corrupt file? Is my graphics card really bad? What is the cause of the problem? Should I download a new version of blue stacks or should I consider upgrading my 2 Giga Bytes of Random Access Memory? Please mention the source of such problems.
