User blog comment:Rtyh-12/1.1 framerate issues - Help!/@comment-96.22.159.10-20111203170404

I had the same problem, but there's a way to fix it if you folow those Steps:

1- do CTRL-ALT-DEL  and open your processor list (or something... Geez, Damm you French version of Windows XP.) 2- Get rid of the useless programs that are in the list. Dont touch to the ones that you dont know their use, or else you might have to restart your computer, Be Carefull. 3- If you think you took rid of all the useless programs, start the game. 4- VERY IMPORTANT. While loading your world, DO NOT touch ANYTHING until it's totaly Loaded. 5- if your gameplay's getting smoother, you can try opening programs. tough i realy dont recommand opening an Internet session, since those eat up alot of ram. 6- Enjoy.
 * D