Thanks for the help. Like I said, I updated the driver from the website and, after no visible success, even disabled it on Device Manager. Now I uninstalled Realtek drivers, since I'm using the wireless adapter only and it seems to work without any Realtek nonsense.

After new tests (Fallout session) the event still persists. PC is overheating, so I guess I need to get someone to remove the dust and buy a better cooling fan.