Multiple ERR! during upgrade in powershell

[taersious]

npm-debug.log

I'm opening this issue because:

• npm is crashing.
• npm is producing an incorrect install.
• npm is doing something I don't understand.
• Other (see below for feature requests):

What's going wrong?

Cannot upgrade.

npm install --global --production npm-windows-upgrade -v 3.1.1

npm ERR! Windows_NT 6.3.9600
npm ERR! argv "C:\Program Files (x86)\nodejs\\node.exe" "C:\Program Files (x86)\nodejs\node_modules\npm\bin\np
m-cli.js" "install" "--global" "--production" "npm-windows-upgrade" "npm-windows-upgrade" "--npm-version" "3.1.1"
npm ERR! node v0.12.2
npm ERR! npm v2.7.4
npm ERR! code CERT_UNTRUSTED

npm ERR! certificate not trusted
npm ERR!
npm ERR! If you need help, you may report this error at:
npm ERR! https://github.com/npm/npm/issues

npm ERR! Please include the following file with any support request:
npm ERR! C:\WINDOWS\system32\npm-debug.log

How can the CLI team reproduce the problem?

log attached

supporting information:

• npm -v prints: 2.7.4
• node -v prints: 0.12.2
• npm config get registry prints: https://registry.npmjs.org/
• Windows, OS X/macOS, or Linux?:
• Network issues:
  • Geographic location where npm was run:
  • I use a proxy to connect to the npm registry.
  • I use a proxy to connect to the web.
  • I use a proxy when downloading Git repos.
  • I access the npm registry via a VPN
  • I don't use a proxy, but have limited or unreliable internet access.
• Container:
  • I develop using Vagrant on Windows.
  • I develop using Vagrant on OS X or Linux.
  • I develop / deploy using Docker.
  • I deploy to a PaaS (Triton, Heroku).