Stuck on startup can't see/use interfaces

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I just downloaded the latest Wireshark on a computer that never had it before. I start it, and here's all I see in the Welcome to Wireshark window (I really would have liked to show you the screenshot, but this silly forum won't let me upload a file until I have 60 points! Yes, how does this work for newbies and screenshots??)

Adapter for loopback traffic capture
USBPcap1
USBPcap2

Trying either of the USBPcap interfaces I get errors:

"Data written to the pipe is neither in a supported pcap format nor in pcapng format."
And subsequently:
"Error by extcap pipe: ... Unknown option -- extcap-capture-filter"

I don't know what would be wrong with these pcap things, I only installed exactly what I was led to install by the Wireshark installer.

But to begin with, where are my basic ethernet interfaces?? My system is: Windows 10 Wireshark 3.2.2

Here's what ipconfig has to say about my system:

C:\Users\Sierra BioSystems>ipconfig

Windows IP Configuration


Ethernet adapter Ethernet:

   Connection-specific DNS Suffix  . :
   Link-local IPv6 Address . . . . . : fe80::5491:a473:f924:38a0%5
   IPv4 Address. . . . . . . . . . . : 192.168.1.1
   Subnet Mask . . . . . . . . . . . : 255.255.255.0
   Default Gateway . . . . . . . . . :

Wireless LAN adapter Local Area Connection* 2:

   Media State . . . . . . . . . . . : Media disconnected
   Connection-specific DNS Suffix  . :

Wireless LAN adapter Local Area Connection* 3:

   Media State . . . . . . . . . . . : Media disconnected
   Connection-specific DNS Suffix  . :

Wireless LAN adapter Wi-Fi:

   Connection-specific DNS Suffix  . : hsd1.ca.comcast.net
   IPv6 Address. . . . . . . . . . . : 2603:3006:132f:8000::537c
   IPv6 Address. . . . . . . . . . . : 2603:3006:132f:8000:ad65:6b34:8903:9b08
   Temporary IPv6 Address. . . . . . : 2603:3006:132f:8000:41c2:5b09:46b8:77d5
   Link-local IPv6 Address . . . . . : fe80::ad65:6b34:8903:9b08%8
   IPv4 Address. . . . . . . . . . . : 10.1.10.147
   Subnet Mask . . . . . . . . . . . : 255.255.255.0
   Default Gateway . . . . . . . . . : 10.1.10.1