@Seisolieb Hi, thanks for posting question here. Did you ever notice the country version on the bottom label of the router? What does it say? If it is not EU version, we can not upgrade to EU...

@tx55e Hi, welcome to our community. As the official website support page shows,this model only supports Windows 10 and Windows11. Sorry that we have no further solution towards your request. But, we...

@twanE Hi, welcome to our community. You may try the pre-released firmware1.7.0 in this thread to confirm whether it helps: Early Access Deco M4_V1/V2_1.7.0 Official Ready for Test! Please share your...

@JorgeEscobar Hi, welcome to our community. If you want to use Ethernet backhaul for the Deco network, this guide is for your reference: https://www.tp-link.com/en/support/faq/1794/ Thank you and...

@Rudi101 Hi, welcome to our community. It is suggested to follow the two guides to check and troubleshoot: How to set up Port Forwarding feature on the Deco Why port forwarding feature is not working...

@Sybren Hi, thanks for posting question here. You may refer to Q5 in the guide to check: General questions about Ethernet Backhaul feature on your Deco Best regards.