Failed to upgrade from 6.4.1 to 6.8.0

[sgaspari]

Impossible to update NPM on Windows 2016 server following the described procedure in a PowerShell administrator window :

PS C:\Windows\system32> npm-windows-upgrade --npm-path "C:\nodejs" --no-dns-check
npm-windows-upgrade v6.0.1
? Which version do you want to install? 6.8.0
Given path C:\nodejs is a valid directory.
Upgrading npm... |

Upgrading npm (fallback method)... -

You wanted to install npm 6.8.0, but the installed version is 6.4.1.

A common reason is an attempted "npm install npm" or "npm upgrade npm". As of today, the only solution is to completely uninstall and then reinstall Node.js. For a small tutorial, please see https://github.com/felixrieseberg/npm-windows-upgrade#usage.

Please consider reporting your trouble to https://aka.ms/npm-issues.

Debug Information:

http_parser: 2.8.0 | node: 10.15.1 | v8: 6.8.275.32-node.12 | uv: 1.23.2 | zlib: 1.2.11 | ares: 1.15.0 | modules: 64 | nghttp2: 1.34.0 | napi: 3 | openssl: 1.1.0j | icu: 62.1 | unicode: 11.0 | cldr: 33.1 | tz: 2018e | os: win32 x64 | OS Name: Microsoft Windows Server 2016 Standard OS Version: 10.0.14393 N/A Build 14393

[gingur]

running into the same on after upgrading to node 10 (LTS) on Win10

Debug Information:

http_parser: 2.8.0 | node: 10.15.1 | v8: 6.8.275.32-node.12 | uv: 1.23.2 | zlib: 1.2.11 | ares: 1.15.0 | modules: 64 | nghttp2: 1.34.0 | napi: 3 | openssl: 1.1.0j | icu: 62.1 | unicode: 11.0 | cldr: 33.1 | tz: 2018e | os: win32 64 | OS Name: Microsoft Windows 10 Enterprise
OS Version: 10.0.14393 N/A Build 14393```

[felixrieseberg]

Thanks for letting me know, I'll take a look next week.

[marckassay]

I wasn't able to update npm with npm-windows-upgrade. Perhaps it's because I have nodejs installed by nvm?

At any rate, the solution for me was what Pedi T. mentioned here.

[sgaspari]

NPM successfully updated to 6.8.0 version thanks this batch script : coreybutler/nvm-windows#300 (comment)
To execute into NodeJS install folder (ie. npm.bat script folder)