You should be able to run standard command line git from the windows command shell. Check some of the later answers to this stackoverflow question if running
git --version gives you no response.
.gitconfig means that your git installation was never customized - everything is at default.
.gitconfig is really not recommended, as you can break it in some... special... ways. Just make sure that the git binary is on your $PATH, and interact from a standard command prompt.
EDIT: Akkkk! Ninja replied, and I'm too slow!