Windows 10: Wifi connection slowing ethernet connection

I currently have two pc's running in my house, The first is connected through ethernet and the second over a wifi connection through a range extender. For some reason when the second pc is running any type of download the ethernet pc slows down, it cannot stream video or play games while the download on the wifi pc is running. I can do anything else on both pc's at the same time it seems to be only during downloads and only the wifi connection affects the ethernet connection. When the ethernet connected pc runs a download it doesnt affect the wifi connected pc. I cannot for the life of me figure out why, I have purchased a brand new modem and router with the same issue. I have refreshed the connections, I have literally tried everything I know and Im running 400mb up and 25mb down. Please help

:)

 

Make Windows 10 connect/disconnect to WiFi based on Ethernet connection status

Steps:

1. Go to Control Panel\ All Control Panel Items\ Network and Sharing Center > click on 'Change adapter settings' then use the 'alt button' to show menus and select Advanced Settings...
   
2. Under Connections section, select Ethernet, and use the arrows to the right to move Ethernet above WiFi.
   
3. Click OK.
   

Windows will now prefer the Ethernet over the WiFi for connecting to the internet. This should apply for Windows 8, 8.1, and 10.

 

How to connect to an existing wifi network?

As you suggested, I tried disabling the ethernet adapter and that caused wi-fi to connect, so the desktop wifi does work. Also, I accessed the router and changed the wireless network name (to wfCHS). Thanks!

However many problems are still unresolved:

My laptop behaves just as I want it to. Assuming the router has wifi turned on and the laptop has an ethernet connection, connection to the internet is by ethernet (no private network name), and the wi-fi connection is to my private network "wfCHS", but with no connection to the internet. (If I disconnect the ethernet cable, then wfCHS becomes connected to the internet and stays that way even if I reconnect the cable.) A directory listing shows both laptop and desktop under "Network". Great!

Things are rather different with the desktop. With Ethernet disabled, the desktop shows a wi-fi connection to the internet. Under Settings > Status it's called "wfCHS" but under Network Connections it's called wfCHS2. If I then re-enable the ethernet connection, the wifi connection stays enabled for a minute or two, then disconnects. Further, the ethernet connection is given the name wfCHS2 under both Status and Network Connections.

Why does the desktop give an (unwanted) name to the ethernet connection while the laptop doesn't?

Why does the desktop disconnect its wi-fi connection a minute or so after the ethernet connection is enabled, while the laptop doesn't?

Why does the desktop give two different names to the wifi connection, depending on whether it's viewed under Status or Network Connections, while the laptop doesn't?

Why does the laptop show the desktop under Network, while the desktop shows only itself?

Things are so convoluted that I'd be happy to start over. I've had the desktop "forget" the wi-fi connection as you suggested, then re-established it, but this hasn't helped. Can the ethernet connection also be "forgotten"?

Really appreciate the help you've given so far!

 

Connected by Ethernet and WiFi

Right now my computer is connected by 1.0 Gbps Ethernet and 1.3 Gbps WiFi. Can Windows 10 take advantage of this or should I disable one these connections?