Even if you’ve deleted all your browsing history and normal cookies, Flash cookies are still there and can be used to see what sites you’ve visited.
Moreover, Adobe's "Flash Settings Manager" does not properly remove Flash cookies. So you need special tool to remove flash cookies to ensure your privacy.
In the past we had covered few articles on removing flash cookies from your PC, now here is a new one Flash Cookie Remover (beta), a program which can be used to remove Flash cookies.
This is a portable tool, so no installation required. Currently the program tested and working on XP, Vista and Windows 7 and can be downloaded free from here.