Binary downloads available from https://nmap.org/npcap/
When upgrading, existing installation options will be retrieved from the
Registry. Command-line installer options will still override these.
The installer detects Win10pcap as distinct from WinPcap; since the installer
cannot uninstall Win10pcap, WinPcap API-compatible mode will be disabled in
the installer when it is present. Fixes #999.
The npcap.cat file is no longer dual-signed; since it was not a PE
executable, only one signature is supported. The invalid signature was
causing some installation failures. Fixes #994.
Silent installs will not downgrade the Npcap version unless the new
/downgrade=yesoption is given. Any version of Npcap OEM
will be considered a "newer version" than any non-OEM version.