Wi-Fi problems WIN10?

So first of all all the information I have.

Asus Zenbook UX450FDX_UX450FDX

Intel (R) Wireless-AC 9560 160MHz

Windows 10 Home 10.0.18363 Build 18363

McAfee is installed.

The problem: In my home network, the laptop connects to the Internet without problems, but throws me out again on Steam, for example, surfing is usually problem-free, but also diconected from time to time, e.g. When building the page. Reconnection sometimes works, but usually there's a message that the network information has changed, please change the network key. But then nothing works, restarting or waiting usually helps. My laptop doesn't connect to my girlfriend's network and says the wrong network security key, but of course it's the right one. The positive thing is that the laptop can be stably connected to the Internet via my HandyHotSpot.

Previous attempts: I deactivated, updated, uninstalled, manually downloaded the drivers of the network card… I temporarily switched off the Mcafee firewall, router on and off, reset, everything done. All other devices (which all connect correctly to the Wi-Fi) are separated. Incidentally, I also switched the laptop on and off, but the support actually gave me the tip. Well, if you have an idea, I'm deeply grateful.

I have 3 ideas (A, B + C) for you that you haven't tried yet:

Idea A - delete WLAN profile:

Windows stores all the necessary settings (encryption, IP configuration, DNS, gateway and much more) for the respective WLAN in this profile.

If these settings are messy or different in the meantime (changed due to encryption or frequency band, router update, driver update, …) it can be wrong. My proposition:

Delete the profile for your Wi-Fi in Windows and connect to the Wi-Fi freshly (you need the Wi-Fi key, because you know that).

So: open the properties of your Wi-Fi network and press the "do not save" button. Then freshly connect to your Wi-Fi (remember, Wi-Fi key is required, hopefully you have it; key is also on the bottom of the router, if not changed). Very important! You absolutely have to press the "do not save" button in Windows 10 so that Windows really deletes the WLAN profile completely!

Here also explained: https://praxistipps.chip.de/...ehts_11851

Idea B - Deactivate Bluetooth

Try deactivating Bluetooth, because Wi-Fi with 2.4 GHz and Bluetooth can interfere with each other. If it works better without Bluetooth, switch to 5 GHz Wi-Fi. With dual-band routers, you can set different SSIDs for 2.4 GHz and 5 GHz.

Idea C - take the laptop out of the battery and use it
explained here:

https://www.intel.de/content/www/de/de/support/articles/000031150/network-and-i-o/wireless-networking.html