IDE software wont startup

i am just starting with arduino and have bought all my basic hardware and electronics i have downloaded and installed 1.6.6. and 1.6.5 r5 for windows. the installtion completes sucessfully but when i try to open the application exe. it just flashes the initial start screen for a brief moment an then nothing happens. I have checked my anti virus and firewall and they are not preventing the appication from starting.

I am running a windows 7 64 bit laptop. Any solutions? Help would be greatly appreciated