Install Multiple Versions of Node.js using nvm : https://www.sitepoint.com/quick-tip-multiple-versions-node-nvm/
nvm install 6.2.2
Installation complete. If you want to use this version, type
nvm use 6.2.2
Error: ‘node’ command not recognized.
just had the same problem. I solved it by deleting the empty folder “c:\program files\nodejs”. I then created the folder again. I guess there was a rights issue because the folder got created by an older node installer. https://github.com/coreybutler/nvm-windows/issues/70