I can't run python on my computer

[Camille Benoit]

Hi,it has been about a week since the last time I was able to use Python. Most of the time, the interpreter doesn't show up and when it does and I am trying to run a program it displayed the following message: "IDLE's subprocess didn't make connection. Either IDLE can't start a subprocess or personal firewall software is blocking the connection."  Can you please help me with this. It'd be a huge help.

Thank you very much.