Windows 10: Internet stops working despite connection to Wifi - Potential Network card issue?

After an hour or so my laptop Dell XPS15 Windows 11 drops it's internet connection despite showing it is still connected to the internet Wifi connection present and it claims internet is available. All other devices in my house work fine on the same internet wifi connection.Have uninstalled and reinstalled drivers and done network restart as well which fixes the issue temporarily but after a couple of hours I get the disconnection once again. Looking at event manager in Device Manager for my network adapter - Killer Wireless-n/a/ac 1535 Wireless Network Adapter the below log is present..

:)

 

Wifi connects but no network internet

Currently my internet is being a little troubled. I can connect to the wifi, but only one of the networks on my computer (we have a 2.4 ghz and a 5ghz network, I can only connect to the 2.4ghz network). So, I can connect to that network, and the internet
does in fact work. Youtube runs, I can download things, etc. However, when I over over the wifi symbol, it says (24WillaRouter, Internet Access .... Network, No internet access), but for most intents and purposes, the internet works fine. The exception comes
when I try hosting a game session on my computer that I run, and it acts as if I don't have internet in that scenario, and beyond that, I can't connect to the 5 ghz network for the faster download speeds. As of now, I use a wifi adapter on my computer to connect
to the network and it seems to be in fine working order. Phones and my laptop don't seem to have this problem. I'm really befuddled because I can't seem to find anyone that is having this specific problem.

As a note, here are the things I have tried to resolve the issue:

Reboot the modem and router several times

Restart/Shutdown my computer several times

Multiple ipconfig commands suggested by "12 Step by Step Fix to Wifi Connected but no Internet Access"

Restart Modem via Xfinity Customer Profile

 

Wifi stop working. Win10 shows only one network and it doesn't connect


Product Name: Hp Omen 15
Operating System: Microsoft Windows 10 (64-bit)
Wifi card: Intel Wireless-N 7260

Hi guys,
since some days my wifi has stopped working.
If I click on Wifi icon it shows only ONE (max two) NETWORK:





And I live in a building with 20+ networks, as you can see from WiFi Analyzer (I'm the red one on the right)




If I deactive/reactive Wifi with fn+f12, it goes to Airplane mode and to Wifi mode again and it eventually shows all the networks:





My Wifi is on the top. If it's saved, Windows connects to it and then it drops the connection; if it's not saved and I try to connect, it says "You're not able to connect to this network".
The fun fact is that after some seconds every network disappear and only one is showed (probably the neighbour one..I dunno).

I've already tried to HARD-RESET the notebook keeping the power button for 10/15sec with the laptop turned off.
I've already tried to follow these instructions (http://support.hp.com/us-en/document/c04649175) updating drivers (Intel 18.12.0.3, 18.12.1.2, 18.30.0.9 [Windows 10 default], 18.32.0 [Lastest drivers]) with no success. Everytime I install a new drivers, I uninstalled the previous one + Wireless software + reboot.

I tried to uncheked "Allow this computer to turn off this device to save power" on my Wifi hardware settings without success.

The HP Network support says I didn't choose a Wifi (Really? The problem is I don't see my Wifi on the list!).

This is not related to a new Windows 10 upgrade since I've installed it months ago and It's the first time I've this problem :/ It always worked



I tried different settings too:
I changed channel, I set 802.11g on my router, APSD off on the router.
I set "Magic packet off, ad hoc QoS off, U-APSD off, fat channel off,incremental throughput off, HT mode off" on the card setting without success. Nothing chaned.

The Hardware test doesn't detect any failure.


Note carefully: If I go close to the router, it shows my network with full power connection and it connects to it. Then I go back to my bedroom (probably 3/4 meters far), it KEEPS the connection for 30/40min and It drops the connection and I can't reconnect to it anymore. It always worked perfectly in my room in these months (I bought it in March 2015), so the distance is not a problem, I'm 6/7m far from the router.
In this case It shows my Network (Connected) and the neighbour network...and the other 20+ networks???

The only way I have is USB tethering with my Nexus 5.

Linux: I tried the Wifi connection on Elementary Freya (Ubuntu linux based OS) and it shows 20+ networks available on the list. It has not connection problem with my Wifi, but sometimes it stops working, the webpages stop loading and I must reboot Wifi to reconnect to it (usually after 30/40min using it).

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What's the problem? Is my Wifi card broken? Should I call italian support or you have some suggestion?

 

Laptop can't connect to wifi. Unidentified network no internet access

So often I run into clients/potential clients in my area that think Wi-Fi is the computer connecting to the Internet, in reality Wi-Fi is the connection of the computer to the Wireless Router which in turn is connected to the Internet. A portion of the list of Wi-Fi Routers within less that a mile of me, about half: