Wifi issues on singular device seemingly after Windows Update.
Hello, so I have an issue that I can't seem to fix and is puzzling me a fair bit. I've suddenly lost internet access on my desktop pc, which runs Windows 11. This happened shortly after the most recent Windows quality update (KB5121003). This update was automatically installed august 13th, my issues started at the night of the 15th. There have been no updates to my wifi drivers. Wireless drivers are Realtek. My wifi connection on the pc is through ab usb dongle. My smartphone and laptop have a normal connection to the router without issue. The pc says it is connected, but can't provide internet. Routerpage confirms that the pc is connected, but with an abnormally low speed of 6 mb/s, compared to 400-800+ for the other devices.
Things that I've tried beyond resetting devices is to connect my pc to my phone's wifi hotspot. This worked and provided internet. I've tried forgetting the wifi network and readding it, but this did not solve it either. I've tried pinging my router through my pc, and all the pings timed out. I've looked at the event logs and they tell me that the dynamic key exchange did not succeed within configured time. I've checked that the password is correct by having my laptop forget the network and readding it. Internet was accessible afterwards.
So I know that the credentials work, that the wifi dongle and drivers work, that the wifi works on my laptop and smartphones. But for some reason my desktop pc cannot get internet through the connection. What can I do to solve this?
Edit: the problem somehow fixed itself after a few days. Still have no idea about the cause, or what the fix was. I did threaten to introduce it to a crowbar, but I doubt that that threatening fixed it.