Maven in eclipse or windows

I'm planning to creating a java maven web project. I would like to know whether I have to install maven in windows or install maven in eclipse ? I'm using windows 10 and eclipse oxygen. My network has some restrictions, so i would be adding proxy in settings.xml. I have already tried creating maven project in eclipse with maven embedded in my eclipse,but it was giving multiple errors during jars download. Please suggest me on which way i should proceed and which way is better, whether i should use maven in eclipse or install in windows and use ?