Meine Proxy war falsch Konfiguriert, jetzt findet er yo.
Leider habe ich jetzt das nächste Problem, bei nmp install -g yo kommt ein:
x yo version
ErrorClass [RequestError]: connect ETIMEDOUT 104.16.27.35:443
at ClientRequest.<anonymous> (C:\Temp\npm\node_modules\yo\node_modules\latest-version\node_modules\got\index.js:73:21)
at Object.onceWrapper (events.js:300:26)
at ClientRequest.emit (events.js:210:5)
at TLSSocket.socketErrorListener (_http_client.js:406:9)
at TLSSocket.emit (events.js:210:5)
at emitErrorNT (internal/streams/destroy.js:91:8)
at emitErrorAndCloseNT (internal/streams/destroy.js:59:3)
at processTicksAndRejections (internal/process/task_queues.js:80:21) {
code: 'ETIMEDOUT',
message: 'connect ETIMEDOUT 104.16.27.35:443',
host: 'registry.npmjs.org',
hostname: 'registry.npmjs.org',
method: 'GET',
path: '/yo'