You need to make sure that your computer is meeting the Sekiro Shadows Die Twice system requirements before downloading the game. Following is the configuration your computer should match for the game to work.
OS: Windows 7 or above (64-bit architecture)
Direct X: Version 11
RAM: 8 GB
Processor: AMD Ryzen 5 1400, Intel Core i5-2500K
Graphics Card: AMD Radeon RX 570, NVIDIA GeForce GTX 970.
Storage: 25 GB.