Hi,

So I finally succeed, here some informations for windows users :

-To know if you are running a full node, see how many active connections you have by putting your mouse on the bottom right side of the qt wallet. If you have more than 8 active connections, it means you are running a full node. In the above image, I have a full node (10 active connections):



-If you don't have a full node and you want, please check on https://www.yougetsignal.com/tools/open-ports/ that you are accepting incoming communication on port "9981" (yenten port), your ip address should be already written. See bellow for a node that accept incoming communication (your qt wallet must be running):




-if your port is not open, you need to configure the windows firewall (incoming communication) as follow (allow public,private TCP and UDP, for port 9981 only) :




Then restart yenten-qt.exe, check again that your port is open and wait 10/20 minutes.