Jason, Stop right here, you'll kill the resources in no time using XAMPP package on windows platform.
The package you downloaded is based on Apache, and Apache's performance on Windows is not as good as you can expect from a good web serve,r XAMPP is for development purposes and not for production. This package you downloaded will work as a service and not application, so you can expect 1/3rd of performance that your actual hardware can give.
I'll tell you step by step how to install Moodle manually on WIMP, so you'll get the IIS as web server and database of your choice (MySQL, MariaDB, MS-SQL Server or PostGres).
Now, as I see screenshots you're using Server 2012 R2 (not just Server 2012) as both have different versions of IIS (8.5 and 8.0 respectively), while you've paid for a stable web server already, why to use Apache.
Which database you intend to use? Though there is choice of MS-SQL as well using express edition, but that is limited to 10G database (which is hard to reach even on a huge site), I'll recommend using MariaDB though.
anyway, steps that you'll be taking to setup Servers and Moodle
1: Install VC++, and version depends upon which PHP you're using.
2: Install IIS using server manager, dont just check everything to be installed, go with defaults but do check "CGI" as optional requirements.
3: Download PHP package and Database - You'll be installing database but you dont need to install PHP (just unzipping will work)
4: Enter path to unzipped PHP folder in "environmental variables"
5: Once IIS is installed, setup PHP to be used in IIS
6: additional permissions are to be given to web directory path with user "IIS_USR" --> that user is part of Server.
7: do check your PHP working fine by creating a test php page
8: download and unzip moodle package. ---> you may have to create moodledata folder manually.
Everything should work as it should on managed host from this point.
I know its hard to follow by just reading steps, if you're still having trouble, then let me know, I'll setup a brand new installation of Windows Server 2012 and show you how to setup server and install moodle using screencast.