@TomorrowV My main router from the ISP is set to Bridge mode, and Deco is connected as the primary router and Deco S7 is configured as an Access Point (not Router Mode) These are two conflicting...

@AzizaC This switch has gigabit Ethernet ports. You need to provide more information: how do you measure speeds on Satellite Deco? Also, how is everything wired to everything?

@DSC7 Here is what you can do: delete (remove) all Satellite Deco from your Deco mesh, using Deco app for that. With only Main Deco left, try upgrading again. After that, you can add Satellite Deco...

@JRix Here is an idea: check PC Network Adapter settings. If you are in luck and they are configurable, you could instruct PC to run at not more than 10Mbps Ethernet speed.

@GavinT If you have ISP router, you should check if it is router that loses Internet link. Also, you could switch Deco mesh to Access Point mode: in all things networking it'll be relying on ISP...

@rhbmcse My 2 cents. Satellite Deco with WiFi backhaul will provide at most 50% WiFi speed of Main Deco. This is not Deco mesh issue, but limitation of WiFi technology. If you are getting 400Mbps on...