Wifi, some devices saying 'no internet'

[OutInTheShed]

So, basic wifi/router ADSL provided by ISP a few months ago.
Brother turns up with his 'Black Friday Bargain' Lenovo laptop, it connects to the wifi OK, but keeps intermittently saying 'no internet'.
Other devices have internet on that Wifi.
It does the same with a plug-in usb wifi thingy.
Seems to work on a personal hotspot from a phone, but the phone data is comically patchy at best.

Somebody is telling me some stuff I don't undrstand about 'IPV6'?

[Defcon5]

Was it a new laptop or a refurbished one?

[OutInTheShed]

Defcon5 said:

Was it a new laptop or a refurbished one?

New.
Win 11.

[Richtea1970]

Reboot the router, fixes it 90% of the time.
I get this a lot t with Amazon firesticks.

[OutInTheShed]

Richtea1970 said:

Reboot the router, fixes it 90% of the time.
I get this a lot t with Amazon firesticks.

That seems to work when devices first connect and don't 'see' the internet, but it didn't seem to work with this laptop, which was seeing the internet for a minute or so, then not.

Trouble is, the router is upstairs and takes ages to reboot, by which time things might or might not have sorted themselves out.

I think everyone around here has had a new ADSL router due to the digital voice rollout, so I wonder about channel squabbles and whether our ISPs are dishing out poor routers?

[Baldchap]

If only one laptop is having issues and everything else works, it probably isn't your infrastructure.

[OutInTheShed]

Baldchap said:

If only one laptop is having issues and everything else works, it probably isn't your infrastructure.

The laptop apparently works on other people infrastructure, so I guess it's some incompatibility with the way things are set up?
Like firewalls or something?

[SteveKTMer]

Make sure the laptop isn't in the process of a windows update, or has one upcoming. Then delete the wifi configuration. Then reboot it and add the wifi config back, choose DHCP. Then once it connects, if it doesn't see the Internet, reboot again.

[xeny]

OutInTheShed said:

The laptop apparently works on other people infrastructure, so I guess it's some incompatibility with the way things are set up?
Like firewalls or something?

Unlikely to be firewalls in a normal home setup. You've got normal WPA2 encryption configured. Have you tried looking at the DNS servers and default gateway compared to a laptop that works?

[thebraketester]

Try giving the laptop a static IP address.

[Shadow R1]

Press on wifi icon, once in the menu wifi from the left hand panel > manage known networks > select your one and forget.
Then add again in the normal way.
Sometimes it's post pulling down a load of updates they need this doing.

[119]

And switch off band sharing or disable the 5G WiFi network.

Some decides can’t handle band steering that well and just give up connecting altogether.

[OutInTheShed]

Thanks all, some random combination of those suggestions seems to be working.
But my ancient PC which drives my 3D printer is not afflicted too!

Seems to have had a windoze update. Not only did I think updates were disabled, I'd forgotten I'd left a wifi dongle in it.

[eeLee]

This typically is some oddity with DNS, when connected Windows tries to reach an MS resource and will show "No Internet Connection" if that is not resolved or reached.
I assume the Internet still worked?

[OutInTheShed]

eeLee said:

This typically is some oddity with DNS, when connected Windows tries to reach an MS resource and will show "No Internet Connection" if that is not resolved or reached.
I assume the Internet still worked?

The internet worked on other devices.
The laptop in question seemed to get halfway through some 'feeds' like weather in New York, then fail.

My ancient laptop can no longer find its built in Wifi it seems?
Separate issue I think? Win10 update gone bad?

[eeLee]

Reset network settings, connect again.
If the problem persists, remove the network device in device manager and scan for hardware change to let it install again.

It could be a driver issue, it's less likely to be a Windows issue.

[Baldchap]

To properly reset a network connection do the following at a command prompt:

Ipconfig /release
Ipconfig /flushdns
Ipconfig /renew