Many thanks for the help. I've search for the applocale program and use it, but it still crashed there again. As for the problem, here's what I get every time.
Though is in spanish, so forgive if I write a bad translation (if needed): The instruction in '0x0040f6d0' makes reference to the memory in '0x8259eca6'. The memory cannot be 'written'.
I read on some replies here the same problem. Apparently it was solved by changing your Unicode default to Japanese (as said I had it changed already). Another reply said it was a problem with the font (no idea what to do in that case). Again thanks for the help. I hope I can get it running again (or probably will risk myself to use my father's computer to see if it works there.)