[Pirengle]

--Move all your saved games, mod packs, custom portraits and sounds, etc from the BG2 directory.
--From the Start menu, open the Run command.
--Type in "regedit" and run it.
--before you do anything, back up your registry! Under the File menu, go to "export registry" and save the current registry settings. That way, if you delete something important to your system, you can restore your registry to as it was before you started deleting.
--In the Registry Editor, search for "bg2" and delete the files that look like they go with the BG2 game. (Be careful, as you may have other files with "bg2" in them that aren't part of the game.)