@Lctje Yes, this driver can be used on the Windows 8.1 as well, you can give it a go and monitor, thanks.

@leo33 Kindly try Ivaylo's suggestions, and see if any of those will help. Just to add, when you connect the C80 to the ISP modem, will it be able to get a WAN IP address via PPPoE now? What is it?...

@ImsJ Hello, are you trying to upgrade to this beta firmware? https://static.tp-link.com/2020/202012/20201208/TL-MR6400(EU)v5_1.1.0_0.9.1_[201113-rel63736]_up_boot_all_2020-12-08_09.38.45.zip As per...

@apaquet Hello, thanks for reporting the issue to the community. Please monitor the performance of the replacement unit, report back if there is an issue. Please do as Ivaylo suggested if you still...

@Lukaz Are you able to see the 2.4G and 5G signal on those devices? If yes, what is the error message you got when you try to connect to it? If none of the devices can connect to it, please change...

@Cee Hello, you may unbind the TP-Link device from the existing TP-Link account first as below: Please login the web interface of TP-Link router. Go to Basic->TP-Link Cloud->unbind your TP-Link Cloud...