Install Windows Powershell

Windows 7 & Windows Server 2008 come with powershell installed by default

for all others you can download the installer here

Run Powershell

Start > Run > Powershell

Set-ExecutionPolicy remotesigned
cd ([environment]::GetFolderPath([environment+SpecialFolder]::MyDocuments))
git clone git://github.com/truefit/WindowsPowerShell.git
exit

restart powershell

And run the following command to setup git configuration info and aliases

Setup-Git

Then run the following command to setup the truefit certificate and netrc file for auto login to the truefit repos

Setup-Truefit