I'm upgrading my PC (by purchaing a NEW one - ouch!!) and my GIMP as well. The new, stable version for Windows is 2.4.2, with a prettier GUI. If English isn't your mother language and you prefer reading English like me, they have a solution for you on GIMP Talk. Go to C:\\Program Files\\GIMP-2.0\\lib\\locale and remove all the folders that do not start with en_ and then your GIMP will be ready to take off!