Give full permisson in to below given location also inherite the permission to sub folders and files.
Windows (64 bit OS) : C:\Program Files (x86)\Common Files\Adobe\caps
Windows (32 bit OS) : C:\Program Files\Common Files\Adobe\caps
MAC : /Llibrary/Application support/Adobe/caps
Then try to install, if still not work then Rename media_db.db located in above mentioned location to media_db_old.db
After Renaming try to install the software
Amazing thankyou spent ages trying to sort this out !