Remove Meteor Windows "Updating Package Catalog.." eternal bug. eternal load. and also Show log (brings more confidence.)
set METEOR_LOG=debug & set METEOR_OFFLINE_CATALOG=1
//othher to try
METEOR_PROFILE=1
//or
meteor reset
//Then
meteor add ...
//as normally.
// IN CASE OF EMERGENCY, INSTALL METEOR MANUALLY:
https://github.com/meteor/docs/blob/version-NEXT/long-form/alternate-windows-installation.md