I am new to programming and i decided to learn Python first, so;
I installed Python, latest version 3.4. and I am trying to open Python IDLE(GUI) mode, so when I open I get message "IDLE's subprocess didn't make connection. Either IDLE can't start or personal firewall software is blocking connection.". 
My firewall is not problem beacuse I put Python throught it. I also tried to reinstall it and it didnt made diffirence. So please if somenone can help! 
Thank you on your time :D
This is a fresh install. It works with firewall disabled. As this was a fresh install any answer that deals with AppData does not apply. Nor does any answer dealing with deleting *.py files.
If you are using a third party firewall - uninstall it and use Windows firewall. The main offender here is Avast/AVG. If you really want to you can set such software to "ask" you for rule creation, AVG ignores these rules in this case and blocks what it thinks is an external "Tcp/Udp" (sic) public connection.
Using Process Explorer from SysInternals reveals the succesful connection between the two processes. AVG cannot seem to deal with "phone home" situation originating on the same host. The problem should be more widespread as many debuggers operate in the same way, so there may be some contribution to this problem by the IDLE developers.
Change your firewall provider.
Python error - IDLE's subprocess didn't make connection. Either IDLE can't start or personal firewall software is blocking connection