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There's no point in installing both WinPcap and npcap, Wireshark will use the latter if present.

You can try the following steps to get a working npcap installation:

1. Uninstall both Winpcap and npcap
2. Reboot.
3. Install the latest npcap version from their site. Uncheck the options for WinPcap compatible mode, legacy loopback adaptor and administrative users only.