MC7421 module disappears from Windows device manager

[jerdung]

Hi @kevin1 ,
Your issue is similar to below topic. Can you take a look and see if it helps you?

Mc7455 not detect on windows 10

Hi @itu , You may need to do more steps on the MC7455 pinout in the PTS and compare it with the pinout of your mini-PCIE slots. They are almost incompatible if you are using standard laptop slots. Your problem is similar the topic below. You can refer to it for more detail MC7455 Not Detected - Ubuntu18.04 - Embedded wireless modules / MC/EM Series - Sierra Wireless Forum

Thanks,