Do I need a new network adaptor?

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I have a reasonably old laptop (possibly around 8 years old) and a desktop (around 4 years old). Both are in full working condition and could connect to the internet. A few weeks ago, I moved my broadband provider and they provided, as a router, an Amazon eero. Since then, my laptop has not been able to connect the the internet, but the desktop can (the laptop can’t find the signal from the router).
I’m not very knowledgable about the various Wi-Fi protocols but is this likely to be due to the network card on the laptop not being able to detect the latest signal type of the eero (which I think is ‘n’ or IPv6)?
If that is the case, it seems I get get network cards which can be plugged in via USB but can anyone recommend one which would be able to detect the signal from the eero, is not too bulky and doesn’t cost the earth?
I’m not very knowledgable about the various Wi-Fi protocols but is this likely to be due to the network card on the laptop not being able to detect the latest signal type of the eero (which I think is ‘n’ or IPv6)?
If that is the case, it seems I get get network cards which can be plugged in via USB but can anyone recommend one which would be able to detect the signal from the eero, is not too bulky and doesn’t cost the earth?
Northern Ireland club member No 382 :j
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Most routers in recent years transmit a 2.4ghz or 5ghz signal - and it could be that your new router has been set to transmit only on the 5ghz signal, meaning the wifi card in the laptop may not be able to see it if it's old, and can only see 2.4 ghz signals. I don't have an Eero - but I gather they transmit a sort of mix of the two - and it might be causing the laptop to not see anything.
First thing to check would be to have a look in the router settings.
In the desktop browser - you can log into your router using an address in the search bar which is commonly 192.168.1.1 or 192.168.0.1
You might need to look at your emails/instructions as you should be faced with a login screen.
Sometimes the default is 'admin' and 'password' - but you'll need to see what yours is. (Might even be printed on the router label).
Then once in see whether there's an option to transmit in 2.4ghz only - or something similar.
There's a bit more about it here - this indicates you may only be able to do it temporarily to set up a connection.
https://support.eero.com/hc/en-us/articles/115005497223-Can-I-set-my-eeros-to-use-the-2-4-or-5-GHz-frequency-#:~:text=eero%20uses%20a%20single%20SSID,of%20the%202.4%20GHz%20frequency.
And if you can't get it to talk properly - maybe try a 5ghz wifi usb adapter like this one (others are available):
https://www.amazon.co.uk/TP-Link-TL-WN823N-Wireless-Supports-10-9-10-13/dp/B07LGSDBTF/ref=sr_1_3?crid=20RU2JDWENHSL&keywords=tp-link%2Bwifi%2Bdongle&qid=1673750610&sprefix=tp-link%2Bwifi%2Bdongle%2Caps%2C77&sr=8-3&th=1
It's all guesswork since they haven't bothered to reveal the other half of the equation.
Without more information, I would say the first step would be to switch the eero device to Legacy Mode in the first instance.