Use below steps to setup phabricator/arc cli on windows box.
Download & Install Git Bash.
It needs PHP, if you don't have PHP installed on machine then you use XAMP or WAMP. Find the installation directory for PHP and set system path for that.
Open command prompt and test the php installation by writing php command. If it does not show any error then you can skip step-4.
In case of MSVCR100.dll missing error. download the exe file from here: http://www.microsoft.com/en-in/download/details.aspx?id=30679 and install it.Once again test php installation.
Use Git Bash to do following:
Clone below repos somewhere:
git clone https://github.com/phacility/libphutil.git
git clone https://github.com/phacility/arcanist.git
Again update system path similar to step 3 and add there :
<path>\arcanist\bin
Test arc help command in Git Bash.
Install Phabricator server certificate using
arc install-certificate
command.Add an editor by following https://secure.phabricator.com/book/phabricator/article/arcanist_windows/