Setting up a router or extender can be intimidating.
Not only that, the instructions are too often confusing, whereas normally the process is simple…
Just plug an Ethernet cable into your computer offline, and type the IP address of the router Into your browser search or URL window.. Usually that IP address is 192.168.X. X, where X is usually a zero or one, such as 192.168.1.1. That address may also be marked on the back of the router.
A search of internet will also usually find the IP address of your particular router.
What comes up is a login screen to your router. The usual default login and password is admin. Again, a search will find that information for you if not on the back of your router.
Once logged in, this next screen is intimidating. There are too many choices, and a wrong choice can give you some headaches.
Not to worry. you can always reset the router back to default.
All you really need or want to do is to set up your wifi login and password and very often there is a Wizard to help you do so.
There is also the ability to pick a channel in the wifi spectrum which is the least used.
On a smartphone or tablet, a wifi analyzer app will show where space is least crowded.
That procedure worked for me in a case where a CD failed to set up a very good router in Windows 10, as evidenced by the many negative comments about the router on Amazon.