Microsoft office professional plus encountered an error during setup

Are you getting Error "25004. the product key you entered cannot be used on this machine. this is most likely due to previous office trails being installed or Microsoft office professional plus encountered an error during setup"?

this is the most common problem many faces during installation of office 2010 or higher version recently i upgraded from xp to windows 7 but when i tried to install the trial version of office using different setup including pro and home version i was getting above errors though i deleted all the registries and used several 3rd party office trace and signature removing tools nothing happened the office 2010 setup was very stubborn and never let me install the office even though i never before installed trial version of office 2010 software before

I think there is a major glitch in their piracy protection system since i can see many first time installers also getting this problem and was not able to install the office.

Since i was not able to install genuine copy downloaded from Microsoft i downloaded a cracked copy from torrents and belive me it installed without even a single glitch withing minutes office was up and running.

Though i know its unethical to use cracked version i will be removing it after 30 days :P between i was not still able to find out what went wrong during installation of official setup even though my OS was fresh installation if anyone has any idea about this MS-office error do enlighten us.