I have Eclipse Luna and Maven 3.2.3 installed on a Windows 7 machine behind a corporate firewall.
Trying to create a project from an archetype results in the follow
It worked for = I just removed "archetypes" folder from below location
C:\Users\Lenovo.m2\repository\org\apache\maven
But you may change following for experiment - download latest binary zip of Maven, add to you C:\ drive and change following....
Change Proxy
optional
true
http
10.23.73.253
8080
local.net|some.host.com