Can´t execute "bower install -g ngCordova" EINVALID

hello, please anyone help me !!!

I’m beginning with Ionic, I could get install ionic, cordova and bower so:
npm install -g ionic
npm install -g cordova
npm install -g bower

but when I try to execute “bower install -g ngCordova” I get this error

C:\Users\Daniel F’>bower install -g ngCordova
bower EINVALID Name must be lowercase, can contain digits, dots, dashes, “@” or spaces

I’m using git 2.16.2 version
I’m using node.js 8.11.1 version
I’m using windows 10

Thanks for the help, I hope to have been clear with the problem.