How to Reinstall Broken npm

Delete the Global NPM Folder

https://stackoverflow.com/a/5926706/349659 
npm list -g

For Windows this will most likely be:

%AppData%\npm\node_modules

You can paste that into a folder’s address bar and it will take you there.

Once there delete the folder named npm.

Download the Latest Release of NPM

https://github.com/npm/cli/releases/latest

Grab the zip and unzip it to your node_modules folder that you just deleted the npm folder from.

Rename the folder you extracted from the zip to npm

If you get any warnings about the file path or name being too long skip the warnings.

Update for Good Luck

Now you should be able to run npm i -g npm to update/reinstall npm without any warnings.

I find this step especially important if you had errors in Windows about the path or file name being too long.

You may get the following errors. If you do go and delete or move the files it has listed and you should be able to run npm i -g npm successfully.

npm ERR! Refusing to delete C:\Program Files\nodejs\npx.cmd: is outside C:\Program Files\nodejs\node_modules\npm and not a link
npm ERR! File exists: C:\Program Files\nodejs\npx.cmd
npm ERR! Move it away, and try again.

npm ERR! Refusing to delete C:\Program Files\nodejs\npm.cmd: is outside C:\Program Files\nodejs\node_modules\npm and not a link
npm ERR! File exists: C:\Program Files\nodejs\npm.cmd
npm ERR! Move it away, and try again.

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