Hi, Thank you for your answer. I tried it and it seems to work for serveral hours. The mention fix in the Beta version of the FW let me think it will not recoure in the next 2 days. Thanke you a lot...

On the first look the Range expander works fine. I easily configured it with a new WLAN with a different SSID. My wohle Network worked fine. But after 1-2 day my 2 Windows 10 PCs had no internet...