I want to install Angular version 4.* on my windows 7.
I am currently using Angular version 1.6.*
I tried following command
npm install @angular/{com
I am adding this to update the answer.
If you want to install the latest angular version others answers are for you.
If you want to install a specific version of angular (Get your version number here) You should use the below command.
npm install -g @angular/cli@VERSION_NUMBER
for example, if you want to install angular 1.4.9 command should be like below
npm install -g @angular/cli@1.4.9