Mundo angry!

So ... from a very long time and by that i really mean a lot, every time my client patches or on random occasions my client starts to "calculate differences". When it gets to 4000 or something like that "An unspecified error occurs". I am just wondering if there is a known way to fix this, because i am getting really annoyed. The only way I've found to fix this is by installing the game again. But then it has to patch itself from the whole beginning and i wait hours usually. I also want to add that when i open the client the patch is already at 33%. I mean without even going to there. It doesn't start off from 0 it starts from 33%. And i can't get to fix it even by repairing the patcher. Here are some pictures. The first one is while the patcher calculates differences. The second one is with the error and the third one is after the error. Pls fast responds