Please follow this process before installation.
1. Close all the application running on your system.
2. Update latest flash player.
3. Delete the Flash prefrence in your system.
4. Install CS 6 after all these process
Please let me know whether its working.
I figured it out. I just had to disable my anti virus for a few minutes and
it all worked fine Thanks anyway though
Please update which anti virus is blocking your installation. This will help Adobe to fix this issue in next release or updater.
It is Avast! Antivirus