Why does my PC no longer find the home Wi-Fi?

I'm a little irritated, maybe you can help me:
I have a new PC (Windows 10), which I can now work with for a week.

As of this afternoon, my Wi-Fi network has not appeared in the Wi-Fi list and I can no longer connect accordingly. All other networks (neighbors) are available.

The exciting thing is that all other devices (smartphones, game consoles, laptops, …) easily find the network.

Even if I enter the network manually (name, security key, …) it does not find it or the PC does not establish a connection.

I have already restarted the router, restarted the PC several times, performed the Windows troubleshooting, deactivated and reactivated the network adapter (Broadcom), etc. Pp.

I'm starting to run out of ideas.

Do you have any other ideas?

Check if there are new drivers. Alternatively, you can connect the PC to the router with a LAN cable.

Cable is very inconvenient here. If in doubt, I have to hang the PC on the cable for a short time to look for drivers. However, this seems to me as very unlikely that it is due to the drivers, because all other WLAN networks are shown to me. Only your own does not appear.

https://www.ionas.com/wissen/wlan-funktioniert-nicht-schritt-fuer-schritt-zum-ziel/

Maybe there's something useful.

A so perfect question, with everything that is important, you rarely have. Respect.

One is missing. PCs actually don't have their own Wi-Fi

Since the router sends yes and the other devices are online, it can only be due to the WLAN reception of the PC.

Do you have a Wi-Fi stick on it or a Wi-Fi card installed?

I see that if my stick is not activated, whatever happens, I still have to disconnect it briefly, then it works.

Is not that enough

Settings, network and internet.

Manage known networks via Wi-Fi. Is the connection in there?

Cool!

I try to give as many details as possible in my questions, then mostly a good answer comes!

Is a WLAN card from Asus: https://www.amazon.de/...B00JNA337K

Yes, the connection is in there. Or was inside, but was still not found. Then I took the connection out and added it again by hand. But is still not controlled.

All other networks are only recognized this one and not only on this PC. All other devices find it easily.

Nope - it's not exciting at all.
This is "missing knowledge of physics".

Radio is unstable - always and everywhere.
The reception and transmission properties can be influenced or disturbed by everything. Just because yesterday a connection worked, it doesn't have to be today.
Other devices would be an indication at best if the antenna of the devices were in the same position as the problem device. Otherwise, this is not very meaningful.

What you definitely haven't mentioned is that you tried a different antenna position for your device.

If you want stability, reliability and performance, you can't avoid cables.

When the PC has saved the connection. And the fit (because it works. Has it) it is not.

It is ultimately the card. I looked at them, but that doesn't help here.

There's still the item Hardware in the Wi-Fi settings menu.

And the device manager where you have access to the map. You can find it in the Search strip settings menu.

Does neither help, because it is not recognized twice is unfortunately a guarantee case

Antenna position changed several times (sorry that I did not mention this, that is the first thing I do and I assumed the first logical action).

Wi-Fi is rash here with all devices. The computer is in the same place where my old office PC was (it is now 1m away and finds everyone).

However, this does not explain why I get the whole neighborhood displayed in the WLAn network, the network with the smallest distance (which had a full swing for days) is suddenly no longer found. And only for this PC.

That with the cable is absolutely correct, but is currently not possible here. That will change in a few weeks once we have remodeled here and I'm moving to my new office.

Important: Tests with other devices should be carried out at the same antenna position as the problem device - otherwise this has no meaningful information about the reception quality.

As I said: it can disrupt anything. From garage openers to DECT phones, other WLAN networks to microwaves… The range of possibilities is huge.
If other devices receive the SSID at the same antenna position, we know that it is due to the WLAN hardware of the problem device, if not, it is due to radio interference.

What would also fit is that the transmission of the SSID on the router was switched off. Many (configured) devices can cope with it - but not all.

Alright, thank you very much!
Then I'll try a few more things.