If you rigged the installation, that is why it does not appear in your Add/Remove list and that may have caused it to improperly apply the patch. I am going to assume for the sake of argument that you are not running a pirated copy of the game and that you have registered it via Origin.
If you were unable to install the game correctly before, you have either a damaged disc or something is very wrong with your installation of Windows.
The only thing I can really recommend is to back up your local saved games and remove the game opposite of the manner you installed it. Open Origin and redownload the game through there instead of using any disc. It will download a complete and updated copy of the game and should not need to apply a patch.
