Hi again, I have solved the problem. I think my computer had very little space at C, and probably the virtual memory had not enough. I have uninstalled a lot of programs and I have liberated space. Now it works... last a while, but it works.
I still continue using the version 1.4.4... :) Maybe someone can find the same problem and for this reason I post that here. Thank you Uwe :D I'll try to uninstall everything completely next time (and to restart the computer too after the uninstallation).
