Thank you for your help.
Yesterday night after having checked carefully the firewall looking for wrong permission (without success), having lost any ideas, I decided to read for the last time the txt bug report.
Reading carefully I found the section "Stack dump" along the file.
Well, in that section it's mentioned a file referred to a printer driver, that is the printer checked as favourite in my pc.I tried to update the driver but still nothing so I tried to change the favourite printer and......ARCHICAD 14 STARTED TO WORK!!!!!
After two days of attempts it seems that I, or better, we, manage to solve the problem.
I hope this could be useful for future problems (probably in that section "Stack Dump" there could be written something useful in case of bugs or problem).
:D 😄 😄 😄 😄 😄 😄