Here are an impressive how-to guide written by the Massplanner developers especially for their customers. But you can follow these instructions and get realy easy Amazon Windows Server 2012 for free.
What you will get:
- 1Gb of RAM
- 30Gb Hdd ( you’ll have around 11Gb free after the OS is installed)
- 1 virtual processor at 2.49Ghz
- OS: Microsoft Windows Server 2012 R2 Standard.