Can't ionic start blank project: ECONNRESET

On Windows 11, using various node versions (18 and 20) under NVM with a fresh ionic install, ionic start with Angular blank template gives the following:

Downloading and extracting blank starter Error: read ECONNRESET
at TLSWrap.onStreamRead (node:internal/stream_base_commons:217:20) {
errno: -4077,
code: ‘ECONNRESET’,
syscall: ‘read’,
response: undefined
}

I can intermittently get the tabs option to work, but even that often gives the error.

This is happening on two Windows 11 computers.
Neither are behind a proxy.
I have 2 different ISPs and get the error using either.

On a M1 Mac, running same node versions I’m not having any such issues.

Please help!

Follow up: I had Killer Network OEM software installed. Disabling all related services fixed the issue.