2-3 years ago i performed on my SSD a so called "clean" installation of win7. When you start the installation routine of windows then windows automatically chooses the best settings (defragementation, trim, pre-fetch, etc) for your SSD. As far as i know:
by default windows turns all optimization options off for a SSD. Simply because they are 'useless': the don't increase the
performance of a SSD. You should not change these settings made by the windows setup/setup routine for a SSD.
Also: any other tools/3rd party tools that are offering optimizations for a SSD are also simply useless/not recomended.
On the other side: defragmentation of HDDs is neccessary. It increases the performance and reliability of a HDD.