In order for you to play ATLAS on Windows with minimal graphics settings, your computer must meet the following requirements
OS *:
Windows 7/8.1/10 (64-bit versions)
Processor (CPU):
Intel Core i5-2400/AMD FX-8320 or better
Memory (RAM):
4 GB RAM
Graphics Card:
NVIDIA GTX 770 2GB/AMD Radeon HD 7870 2GB or better
Storage:
120 GB available space