The conveyor belt is moving too fast due to your CPU; a problem which the patch did not fix. Your best bet is to download a program that will slow down your CPU (temporarily, of course). You can get a trial with CPU Killer (
http://download.com.com/3000-2094-7789535.html?tag=lst-0-1), which allows for 20minutes of slow-processing. This should be all you need.
If all else fails, load lots of stuff in the background before running Grim.