How to list installed Chocolatey packages

The use of BASH is inconsistent with Chocolatey commands. I would recommend cmd.exe or powershell.

With Cygwin install, it could be a variety of factors causing this issue. Do you have a link to that image or the text somewhere so we can take a look at what might be happening? It's hard to make out from the image.

The installed version of nodejs comes with npm installed so you don't need that. However removing the nodejs package is not enough as it is a meta package that points to either the *.install or *.commandline packages.

Please do the following:

1. Ensure you are on the more recent version of choco (0.9.9.x series)
2. choco uninstall npm -dvyaf
3. choco uninstall nodejs.commandline -dvyaf

This will remove all versions of npm and remove the bin files (shim redirects that are on the path. Then it will remove the portable version of nodejs (nodejs.commandline) and all versions. These are force removes to clean up the directories completely.

If you have already done some of this, just head into the %ChocolateyInstall%\lib directory and remove the folders that start with npm and nodejs.commandline.