Fwd: Python does not start

Dear Sirs, when I click on the icon "IDLE (Python 3.5 32-bit)" nothing happens. It used to work and at some point it just didn't react. I have reinstalled the program several times and no improvement. I have also tried to run it as administrator, and installed other version too, but neither of them

Python does not start

How do I find stdlib files? Regards -- https://mail.python.org/mailman/listinfo/python-list