Mtkihvx.dll __top__ Page
Some users have better luck with the "Lenovo" version of the MT7921 driver even on non-Lenovo machines, as they tend to be more stable. Disable Power Saving for the Adapter Right-click the Start button and select Device Manager .
If you are experiencing Wi-Fi crashes or "WLAN Extensibility Module has stopped" errors in your Event Viewer, the file is the likely culprit. This file is a component of the MediaTek Wi-Fi driver (often for MT7921 or MT7922 cards) found in many modern ASUS, Lenovo, and MSI laptops. mtkihvx.dll
This drains the static charge and resets the Wi-Fi card hardware. Plug it back in and restart. Some users have better luck with the "Lenovo"
Here is a proper post/guide you can use to troubleshoot this issue or share with others facing the same problem: This file is a component of the MediaTek