Hello Yang,
I have attempted to test Npcap 0.04 on my primary Windows 8.1 machine.
After uninstalling any previous WinPCap or Npcap I rebooted and then successfully installed Npcap 0.04.
The Npcap Loopback Adapter shows up in the list from the Device Manager's Network adapter.
The good news is that starting Wireshark with Npcap 0.04 installed does NOT trigger a BSoD.
But unlike the earlier versions, the NPcap Loopback Adapter does no longer shows up in the list of interfaces available to Wireshark.
Just to be sure of the results I also installed 0.04 on a second Windows 8.1 machine I have access to. The results were the same. The Npcap Loopback Adapter is installed but inaccessible to Wireshark.
If you want me to give the 0.04 debug version a try using the steps your documented for Pascal please let me know.
Best regards,
Jim Y.