Egemen teşekkür ederim. Ama benim windows'um ingilizce ve senin mesajının ingilizce windowslar için olanını buldum :
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When was the last time you were able to change the firewall settings?
Did you make any changes to the computer recently?
What antivirus software is installed on you computer?
Check for the service for Windows Firewall Service if it is started or not.
1. Click on Start
2. In the start Search box type Services
3. Right Click on - RUN AS ADMIN
Check if the below mentioned services has the mentioned status and start up type.
windows firewall Started Automatic\Manual.
base filtering engine Started Automatic\Manual.
windows firewall autorization driver Started Automatic\Manual.
Also check the dependency services that are required for Windows Firewall Service to run.
To check that double click on the service and click on the dependency tab.